2
s/p left orbital decompression. rtrophy (*) is present as is com e (arrow). The left apex is more displace into the temporal fossa Axial CT shows severe TED. The shed line drawn from the lateral This extreme proptosis causes (A) Coronal CT of a patient s Inferior and medial rectus hype pression of the right optic nerv relaxed as the orbital contents and sinuses (arrowheads). (B) A entire globe is anterior to a das canthus to the lacrimal crest. Graves’ disease, an autoimmune disorder that consists of hyperthyroidism, goiter, and exophthalmos, is the most common cause of hyperthyroidism (incidence 5 in 10,000). More women are afflicted, but men show more severe orbitopathy. Immunoglobins activate thyrotropin receptors causing thyromegaly and thyroxin release. Antibody- mediated infiltrates thicken the orbital tissues, but uniquely spare the lateral rectus muscle (Figure 1A). Only 6% of Graves’ patients have clinical thyroid eye disease (TED). As orbital volumes expand, globes become proptotic and eyelids cannot fully close (Figure 1B). The resultant exposure keratitis causes painful irritation and redness. Optic nerve compression and diplopia from muscle fibrosis may further deteriorate vision, culminating in blindness. Although the mechanism is unclear, radioactive iodine ablation therapy and smoking significantly accelerate the development and progression of TED. Medical therapy aims to control orbital inflammation. Oral steroids benefit acutely, but fail to halt overall progression. External-beam radiation (XRT) may improve the acute inflammation but potentiates long-term fibrosis. The modest benefit of XRT has the high cost of long-term dry eye keratitis and premature cataracts. Orbital decompression, the surgical removal of the orbital walls, displaces the orbital girth and relieves the pressure on the globe, thus resolving the proptosis. By performing equal decompression of the medial and lateral orbital walls, the globe remains centered and does not tilt (e.g. eso- or exotropia). Therefore, balanced orbital decompression maximally relieves proptosis while minimizing diplopia. CASE STUDY A 24 year-old transmission mechanic found it impossible to work because of a new tremor, blurry vision, and heat intolerance. He was diagnosed with Graves’ disease and his hyperthyroidism was effectively controlled with methimazole. His vision, however, continued to deteriorate and his eyes were red and painful. Exam revealed severe scleral injection and proptosis (Hertel = 28 mm). CT confirmed no orbital masses (Figure 2A). He underwent bilateral balanced orbital decompression. The lateral and inferior walls were removed via concealed transconjunctival and lateral canthotomy incisons. Concurrently, an endoscopic endonasal approach allowed the medial wall and strut to be removed. The lateral orbital rims were advanced anteriorly and secured with bone grafts, thus moving the lateral canthus forward and optimizing lid closure. Stereotactic image-guidance surgical navigation safely allowed for maximum decompression of the orbital walls to the skull base and orbital apex. He had a succesful resultant decompression (Figure 2B). Continued Amol Bhatki, MD, Grant Gilliland, MD and Manu Gupta, MD (A) Coronal CT after left orbital decompression. Inferior and medial rectus hypertrophy (*) and right optic nerve (arrow) compression. Displacement into the temporal fossa and sinuses (arrowheads) results in less orbital crowding. (B) Axial CT of another patient. The entire globe is anterior to the orbital plane. Extreme proptosis causes optic nerve stretching (arrow) and exposure keratitis. (A) Preop CT shows proptosis with both muscle and fat hypertrophy. Most of the globe is anterior to the orbital plane (dashed line). (B) After bilateral balanced orbital decompression, the orbital tissues have displaced successfully into the temporal fossa (arrowheads) and ethmoid sinuses (*). The proptosis has resolved and the equator of the globe is now posterior to the orbital plane. Orbital Decompression for Thyroid Eye Disease FIGURE 1 FIGURE 2 Volume 1 • Number 6 • Winter 2017 A B A B Skull Base Center Clinical Case Report

Modern Surgical Approaches to Tuberculum Sellae Orbital

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Page 1: Modern Surgical Approaches to Tuberculum Sellae Orbital

Graves’ disease, an autoimmune disorder that consists of hyperthyroidism, goiter, and exophthalmos, is the most common cause of hyperthyroidism (incidence 5 in 10,000). More women are afflicted, but men show more severe orbit-opathy. Immunoglobins activate thyrotropin receptors causing thyromegaly and thyroxin release. Antibody-mediated infiltrates thicken the orbital tissues, but uniquely spare the lateral rectus muscle (Figure 1A). Only 6% of Graves’ patients have clinical thyroid eye disease (TED). As orbital volumes expand, globes become proptotic and eyelids cannot fully close (Figure 1B). The resultant exposure keratitis causes painful irritation and redness. Optic nerve compression and diplopia from muscle fibrosis may further deteriorate vision, culminating in blindness. Although the mechanism is unclear, radioactive iodine ablation therapy and smoking significantly accelerate the development and progression of TED. Medical therapy aims to control orbital inflammation. Oral steroids benefit acutely, but fail to halt overall progression. External-beam radiation (XRT) may improve the acute inflammation but potentiates long-term fibrosis. The modest benefit of XRT has the high cost of long-term dry eye keratitis and premature cataracts. Orbital decompression, the surgical removal of the orbital walls, displaces the orbital girth and relieves the pressure on the globe, thus resolving the proptosis. By performing equal

Orbital Decompression for Thyroid Eye Disease

 

(A)   Coronal   CT   of   a   patient   s/p   left   orbital   decompression.  Inferior  and  medial  rectus  hypertrophy  (*)  is  present  as  is  com-­‐pression  of   the  right  optic  nerve   (arrow).  The   left  apex   is  more  relaxed  as  the  orbital  contents  displace  into  the  temporal  fossa  and   sinuses   (arrowheads).   (B)   Axial   CT   shows   severe   TED.   The  entire  globe  is  anterior  to  a  dashed  line  drawn  from  the  lateral    canthus   to   the   lacrimal   crest.   This   extreme   proptosis   causes  

decompression of the medial and lateral orbital walls, the globe remains centered and does not list (e.g. eso- or exo-tropia). Therefore, balanced orbital decompression maximally relieves proptosis while minimizing diplopia. CASE REPORT A 24 year-old transmission mechanic found it impossible to work because of a new tremor, blurry vision, and heat intolerance. He was diagnosed with Graves’ disease and his hyperthyroidism was effectively controlled with methimazole. His vision, however, continued to deteriorate and his eyes were red and painful. Exam revealed severe scleral injection and proptosis (Hertel = 28 mm). CT confirmed no orbital masses (Figure 2A). He underwent bilateral balanced orbital decompression. The lateral and inferior walls were removed via concealed transconjunctival and lateral canthotomy incisons. Concur-rently, an endoscopic endonasal approach allowed the medial wall and strut to be removed. The lateral orbital rims were advanced anteriorly and secured with bone grafts, thus moving the lateral canthus forward and optimizing lid closure. Stereotactic image-guidance surgical navigation safely allowed for maximum decompression of the orbital walls to the skull base and orbital apex. He had a succesful resultant decompression (Figure 2B). His eye pain and irritation resolved, and his vision and proptosis improved dramatically (Hertel = 17 mm) with an 11

(A) Coronal CT after left orbital decompression. Inferior and medial rectus hypertrophy (*) and right optic nerve (arrow) com-pression are present. Removed orbital walls allow displacement into the temporal fossa and sinuses (arrowheads) resulting in a less crowded orbit. (B) Axial CT shows severe TED. The entire globe is anterior to the orbital plane: a line from the lateral canthus to the lacrimal crest. This extreme proptosis causes stretching of the optic nerve (arrow) and exposure keratitis.

Amol Bhatki, MD, Grant Gilliland, MD and Manu Gupta, MD

(A) Preop axial CT shows significant proptosis with hypertrophy of both the orbital fat and extraocular muscles. The majority of the globe is anterior to the orbital plane (dashed line). (B) After bilateral balanced orbital decompression, the orbital tissues have been displaced successfully into the temporal fossa (arrowheads) and ethmoid sinuses (*). Because of this, the proptosis has resolved and the equator of the globe is now posterior to the orbital plane.

Figure 1 Figure 2

Graves’ disease, an autoimmune disorder that consists of hyperthyroidism, goiter, and exophthalmos, is the most common cause of hyperthyroidism (incidence 5 in 10,000). More women are afflicted, but men show more severe orbit-opathy. Immunoglobins activate thyrotropin receptors causing thyromegaly and thyroxin release. Antibody-mediated infiltrates thicken the orbital tissues, but uniquely spare the lateral rectus muscle (Figure 1A). Only 6% of Graves’ patients have clinical thyroid eye disease (TED). As orbital volumes expand, globes become proptotic and eyelids cannot fully close (Figure 1B). The resultant exposure keratitis causes painful irritation and redness. Optic nerve compression and diplopia from muscle fibrosis may further deteriorate vision, culminating in blindness. Although the mechanism is unclear, radioactive iodine ablation therapy and smoking significantly accelerate the development and progression of TED. Medical therapy aims to control orbital inflammation. Oral steroids benefit acutely, but fail to halt overall progression. External-beam radiation (XRT) may improve the acute inflammation but potentiates long-term fibrosis. The modest benefit of XRT has the high cost of long-term dry eye keratitis and premature cataracts. Orbital decompression, the surgical removal of the orbital walls, displaces the orbital girth and relieves the pressure on the globe, thus resolving the proptosis. By performing equal

Orbital Decompression for Thyroid Eye Disease

 

(A)   Coronal   CT   of   a   patient   s/p   left   orbital   decompression.  Inferior  and  medial  rectus  hypertrophy  (*)  is  present  as  is  com-­‐pression  of   the  right  optic  nerve   (arrow).  The   left  apex   is  more  relaxed  as  the  orbital  contents  displace  into  the  temporal  fossa  and   sinuses   (arrowheads).   (B)   Axial   CT   shows   severe   TED.   The  entire  globe  is  anterior  to  a  dashed  line  drawn  from  the  lateral    canthus   to   the   lacrimal   crest.   This   extreme   proptosis   causes  

decompression of the medial and lateral orbital walls, the globe remains centered and does not list (e.g. eso- or exo-tropia). Therefore, balanced orbital decompression maximally relieves proptosis while minimizing diplopia. CASE REPORT A 24 year-old transmission mechanic found it impossible to work because of a new tremor, blurry vision, and heat intolerance. He was diagnosed with Graves’ disease and his hyperthyroidism was effectively controlled with methimazole. His vision, however, continued to deteriorate and his eyes were red and painful. Exam revealed severe scleral injection and proptosis (Hertel = 28 mm). CT confirmed no orbital masses (Figure 2A). He underwent bilateral balanced orbital decompression. The lateral and inferior walls were removed via concealed transconjunctival and lateral canthotomy incisons. Concur-rently, an endoscopic endonasal approach allowed the medial wall and strut to be removed. The lateral orbital rims were advanced anteriorly and secured with bone grafts, thus moving the lateral canthus forward and optimizing lid closure. Stereotactic image-guidance surgical navigation safely allowed for maximum decompression of the orbital walls to the skull base and orbital apex. He had a succesful resultant decompression (Figure 2B). His eye pain and irritation resolved, and his vision and proptosis improved dramatically (Hertel = 17 mm) with an 11

(A) Coronal CT after left orbital decompression. Inferior and medial rectus hypertrophy (*) and right optic nerve (arrow) com-pression are present. Removed orbital walls allow displacement into the temporal fossa and sinuses (arrowheads) resulting in a less crowded orbit. (B) Axial CT shows severe TED. The entire globe is anterior to the orbital plane: a line from the lateral canthus to the lacrimal crest. This extreme proptosis causes stretching of the optic nerve (arrow) and exposure keratitis.

Amol Bhatki, MD, Grant Gilliland, MD and Manu Gupta, MD

(A) Preop axial CT shows significant proptosis with hypertrophy of both the orbital fat and extraocular muscles. The majority of the globe is anterior to the orbital plane (dashed line). (B) After bilateral balanced orbital decompression, the orbital tissues have been displaced successfully into the temporal fossa (arrowheads) and ethmoid sinuses (*). Because of this, the proptosis has resolved and the equator of the globe is now posterior to the orbital plane.

Figure 1 Figure 2

Graves’ disease, an autoimmune disorder that consists of hyperthyroidism, goiter, and exophthalmos, is the most common cause of hyperthyroidism (incidence 5 in 10,000). More women are afflicted, but men show more severe orbit-opathy. Immunoglobins activate thyrotropin receptors causing thyromegaly and thyroxin release. Antibody-mediated infiltrates thicken the orbital tissues, but uniquely spare the lateral rectus muscle (Figure 1A). Only 6% of Graves’ patients have clinical thyroid eye disease (TED). As orbital volumes expand, globes become proptotic and eyelids cannot fully close (Figure 1B). The resultant exposure keratitis causes painful irritation and redness. Optic nerve compression and diplopia from muscle fibrosis may further deteriorate vision, culminating in blindness. Although the mechanism is unclear, radioactive iodine ablation therapy and smoking significantly accelerate the development and progression of TED. Medical therapy aims to control orbital inflammation. Oral steroids benefit acutely, but fail to halt overall progression. External-beam radiation (XRT) may improve the acute inflammation but potentiates long-term fibrosis. The modest benefit of XRT has the high cost of long-term dry eye keratitis and premature cataracts. Orbital decompression, the surgical removal of the orbital walls, displaces the orbital girth and relieves the pressure on the globe, thus resolving the proptosis. By performing equal

Orbital Decompression for Thyroid Eye Disease

 

(A)   Coronal   CT   of   a   patient   s/p   left   orbital   decompression.  Inferior  and  medial  rectus  hypertrophy  (*)  is  present  as  is  com-­‐pression  of   the  right  optic  nerve   (arrow).  The   left  apex   is  more  relaxed  as  the  orbital  contents  displace  into  the  temporal  fossa  and   sinuses   (arrowheads).   (B)   Axial   CT   shows   severe   TED.   The  entire  globe  is  anterior  to  a  dashed  line  drawn  from  the  lateral    canthus   to   the   lacrimal   crest.   This   extreme   proptosis   causes  

decompression of the medial and lateral orbital walls, the globe remains centered and does not list (e.g. eso- or exo-tropia). Therefore, balanced orbital decompression maximally relieves proptosis while minimizing diplopia. CASE REPORT A 24 year-old transmission mechanic found it impossible to work because of a new tremor, blurry vision, and heat intolerance. He was diagnosed with Graves’ disease and his hyperthyroidism was effectively controlled with methimazole. His vision, however, continued to deteriorate and his eyes were red and painful. Exam revealed severe scleral injection and proptosis (Hertel = 28 mm). CT confirmed no orbital masses (Figure 2A). He underwent bilateral balanced orbital decompression. The lateral and inferior walls were removed via concealed transconjunctival and lateral canthotomy incisons. Concur-rently, an endoscopic endonasal approach allowed the medial wall and strut to be removed. The lateral orbital rims were advanced anteriorly and secured with bone grafts, thus moving the lateral canthus forward and optimizing lid closure. Stereotactic image-guidance surgical navigation safely allowed for maximum decompression of the orbital walls to the skull base and orbital apex. He had a succesful resultant decompression (Figure 2B). His eye pain and irritation resolved, and his vision and proptosis improved dramatically (Hertel = 17 mm) with an 11

(A) Coronal CT after left orbital decompression. Inferior and medial rectus hypertrophy (*) and right optic nerve (arrow) com-pression are present. Removed orbital walls allow displacement into the temporal fossa and sinuses (arrowheads) resulting in a less crowded orbit. (B) Axial CT shows severe TED. The entire globe is anterior to the orbital plane: a line from the lateral canthus to the lacrimal crest. This extreme proptosis causes stretching of the optic nerve (arrow) and exposure keratitis.

Amol Bhatki, MD, Grant Gilliland, MD and Manu Gupta, MD

(A) Preop axial CT shows significant proptosis with hypertrophy of both the orbital fat and extraocular muscles. The majority of the globe is anterior to the orbital plane (dashed line). (B) After bilateral balanced orbital decompression, the orbital tissues have been displaced successfully into the temporal fossa (arrowheads) and ethmoid sinuses (*). Because of this, the proptosis has resolved and the equator of the globe is now posterior to the orbital plane.

Figure 1 Figure 2

Graves’ disease, an autoimmune disorder that consists of hyperthyroidism, goiter, and exophthalmos, is the most common cause of hyperthyroidism (incidence 5 in 10,000). More women are afflicted, but men show more severe orbit-opathy. Immunoglobins activate thyrotropin receptors causing thyromegaly and thyroxin release. Antibody-mediated infiltrates thicken the orbital tissues, but uniquely spare the lateral rectus muscle (Figure 1A). Only 6% of Graves’ patients have clinical thyroid eye disease (TED). As orbital volumes expand, globes become proptotic and eyelids cannot fully close (Figure 1B). The resultant exposure keratitis causes painful irritation and redness. Optic nerve compression and diplopia from muscle fibrosis may further deteriorate vision, culminating in blindness. Although the mechanism is unclear, radioactive iodine ablation therapy and smoking significantly accelerate the development and progression of TED. Medical therapy aims to control orbital inflammation. Oral steroids benefit acutely, but fail to halt overall progression. External-beam radiation (XRT) may improve the acute inflammation but potentiates long-term fibrosis. The modest benefit of XRT has the high cost of long-term dry eye keratitis and premature cataracts. Orbital decompression, the surgical removal of the orbital walls, displaces the orbital girth and relieves the pressure on the globe, thus resolving the proptosis. By performing equal

Orbital Decompression for Thyroid Eye Disease

 

(A)   Coronal   CT   of   a   patient   s/p   left   orbital   decompression.  Inferior  and  medial  rectus  hypertrophy  (*)  is  present  as  is  com-­‐pression  of   the  right  optic  nerve   (arrow).  The   left  apex   is  more  relaxed  as  the  orbital  contents  displace  into  the  temporal  fossa  and   sinuses   (arrowheads).   (B)   Axial   CT   shows   severe   TED.   The  entire  globe  is  anterior  to  a  dashed  line  drawn  from  the  lateral    canthus   to   the   lacrimal   crest.   This   extreme   proptosis   causes  

decompression of the medial and lateral orbital walls, the globe remains centered and does not list (e.g. eso- or exo-tropia). Therefore, balanced orbital decompression maximally relieves proptosis while minimizing diplopia. CASE REPORT A 24 year-old transmission mechanic found it impossible to work because of a new tremor, blurry vision, and heat intolerance. He was diagnosed with Graves’ disease and his hyperthyroidism was effectively controlled with methimazole. His vision, however, continued to deteriorate and his eyes were red and painful. Exam revealed severe scleral injection and proptosis (Hertel = 28 mm). CT confirmed no orbital masses (Figure 2A). He underwent bilateral balanced orbital decompression. The lateral and inferior walls were removed via concealed transconjunctival and lateral canthotomy incisons. Concur-rently, an endoscopic endonasal approach allowed the medial wall and strut to be removed. The lateral orbital rims were advanced anteriorly and secured with bone grafts, thus moving the lateral canthus forward and optimizing lid closure. Stereotactic image-guidance surgical navigation safely allowed for maximum decompression of the orbital walls to the skull base and orbital apex. He had a succesful resultant decompression (Figure 2B). His eye pain and irritation resolved, and his vision and proptosis improved dramatically (Hertel = 17 mm) with an 11

(A) Coronal CT after left orbital decompression. Inferior and medial rectus hypertrophy (*) and right optic nerve (arrow) com-pression are present. Removed orbital walls allow displacement into the temporal fossa and sinuses (arrowheads) resulting in a less crowded orbit. (B) Axial CT shows severe TED. The entire globe is anterior to the orbital plane: a line from the lateral canthus to the lacrimal crest. This extreme proptosis causes stretching of the optic nerve (arrow) and exposure keratitis.

Amol Bhatki, MD, Grant Gilliland, MD and Manu Gupta, MD

(A) Preop axial CT shows significant proptosis with hypertrophy of both the orbital fat and extraocular muscles. The majority of the globe is anterior to the orbital plane (dashed line). (B) After bilateral balanced orbital decompression, the orbital tissues have been displaced successfully into the temporal fossa (arrowheads) and ethmoid sinuses (*). Because of this, the proptosis has resolved and the equator of the globe is now posterior to the orbital plane.

Figure 1 Figure 2

Graves’ disease, an autoimmune disorder that consists of hyperthyroidism, goiter, and exophthalmos, is the most common cause of hyperthyroidism (incidence 5 in 10,000). More women are afflicted, but men show more severe orbitopathy. Immunoglobins activate thyrotropin receptors causing thyromegaly and thyroxin release. Antibody-mediated infiltrates thicken the orbital tissues, but uniquely spare the lateral rectus muscle (Figure 1A).

Only 6% of Graves’ patients have clinical thyroid eye disease (TED). As orbital volumes expand, globes become proptotic and eyelids cannot fully close (Figure 1B). The resultant exposure keratitis causes painful irritation and redness. Optic nerve compression and diplopia from muscle fibrosis may further deteriorate vision, culminating in blindness. Although the mechanism is unclear, radioactive iodine ablation therapy and smoking significantly accelerate the development and progression of TED.

Medical therapy aims to control orbital inflammation. Oral steroids benefit acutely, but fail to halt overall progression. External-beam radiation (XRT) may improve the acute inflammation but potentiates long-term fibrosis. The modest benefit of XRT has the high cost of long-term dry eye keratitis and premature cataracts.

Orbital decompression, the surgical removal of the orbital walls, displaces the orbital girth and relieves the pressure on

the globe, thus resolving the proptosis. By performing equal decompression of the medial and lateral orbital walls, the globe remains centered and does not tilt (e.g. eso- or exotropia). Therefore, balanced orbital decompression maximally relieves proptosis while minimizing diplopia.

CASE STUDYA 24 year-old transmission mechanic found it impossible to work because of a new tremor, blurry vision, and heat intolerance. He was diagnosed with Graves’ disease and his hyperthyroidism was effectively controlled with methimazole.His vision, however, continued to deteriorate and his eyes were red and painful. Exam revealed severe scleral injection and proptosis (Hertel = 28 mm). CT confirmed no orbital masses (Figure 2A).

He underwent bilateral balanced orbital decompression. The lateral and inferior walls were removed via concealed transconjunctival and lateral canthotomy incisons. Concurrently, an endoscopic endonasal approach allowed the medial wall and strut to be removed. The lateral orbital rims were advanced anteriorly and secured with bone grafts, thus moving the lateral canthus forward and optimizing lid closure. Stereotactic image-guidance surgical navigation safely allowed for maximum decompression of the orbital walls to the skull base and orbital apex.

He had a succesful resultant decompression (Figure 2B).

Continued

Amol Bhatki, MD, Grant Gilliland, MD and Manu Gupta, MD

(A) Coronal CT after left orbital decompression. Inferior and medial rectus hypertrophy (*) and right optic nerve (arrow) compression. Displacement into the temporal fossa and sinuses (arrowheads) results in less orbital crowding. (B) Axial CT of another patient. The entire globe is anterior to the orbital plane. Extreme proptosis causes optic nerve stretching (arrow) and exposure keratitis.

(A) Preop CT shows proptosis with both muscle and fat hypertrophy. Most of the globe is anterior to the orbital plane (dashed line). (B) After bilateral balanced orbital decompression, the orbital tissues have displaced successfully into the temporal fossa (arrowheads) and ethmoid sinuses (*). The proptosis has resolved and the equator of the globe is now posterior to the orbital plane.

Orbital Decompression for Thyroid Eye Disease

FIGURE 1 FIGURE 2

Volume 1 • Number 6 • Winter 2017

A B A B

Modern Surgical Approaches to Tuberculum Sellae Meningiomas

Coronal

Figure 1

Skull Base Center Clinical Case Report

Coronal contrast-enhanced MRI anterior (A) and more pos-terior (B). The optic nerves (white arrow) are seen lateral to the tumor (T) throughout their course. Note the dural tail (blue arrow), optic canal extension (white arrowhead), and intimate relationship to cavernous carotid (black arrowhead) typical of TSM.

(A) Preoperative MRI shows expansile, homogenously enhancing tumor with dural tail (blue arrow) that displac-es the infundibulum dorsally (white arrowhead). (B) One year after EEA, MRI shows a normal infundibulum (white arrowhead) and the outline of a well-healed vascularized flap (white arrows).

Figure 2

Amol Bhatki, M.D. (Otolaryngology); Caetano Coimbra, M.D. (Neurosurgery)

Patients with tuberculum sellae meningiomas (TSM) often present with subtle, progressive visual deterioration. These tumors expand the suprasellar space displacing the optic nerves and chiasm; optic canal extension is frequent. TSM typically demonstrate homogenous contrast enhancement, normal sellar dimensions, and dural tails on MRI differentiating them from pituitary adenomas.

Conventional pterional, bifrontal, or orbito-zygomatic crani-otomy requires frontal and temporal lobe retraction, extensive subarachnoid dissection, and facial disassembly. Modern techniques can resolve these shortcomings. The endoscopic endonasal approach (EEA) provides a transnasal corridor obviating brain retraction, neural manipulation, and facial osteotomies. Alternatively, the focused orbito-zygomatic keyhole craniotomy (FOZA) with extradural dissection, a technique developed at the Skull Base Center, provides direct extradural access to the tumor minimizing brain and optic nerve manipulation. The position of the optic nerve defines the appropriate approach.

This report describes two cases that illustrate our modern approach to the treatment of TSM at the Skull Base Center at Baylor University Medical Center at Dallas.

Patient 1: A 41 year-old woman presented with a 1-year history of visual deterioration and a bitemporal visual field deficit. MRI (Figure 1) revealed a sellar and suprasellar mass that enhanced homogenously. The 2.6 cm tumor displaced the infundibulum dorsally and the optic nerve laterally, and extended along a hyperostotic planum sphenoidale.

Because the TSM was medial to the optic nerves, the patient underwent an EEA. Complete tumor excision (Simpson Grade I) was achieved without optic nerve or brain traction. A vas-cularized nasoseptal flap reconstructed the skull base. The patient was discharged on POD#6 and pathology revealed a WHO Grade I meningioma. The patient had total visual recov-ery and normal hormonal function. At 1-year follow-up, there was no evidence of recurrent disease (Figure 2).

Patient 2: A 53 year-old woman presented with similar visual field deficits and headache. MRI again revealed a 2.5 cm enhancing sellar/suprasellar mass. However, this tumor extended lateral to the right optic canal (Figure 3), and would be difficult to remove endonasally without undue nerve traction.

Modern Surgical Approaches to Tuberculum Sellae Meningiomas

Coronal

Figure 1

Skull Base Center Clinical Case Report

Coronal contrast-enhanced MRI anterior (A) and more pos-terior (B). The optic nerves (white arrow) are seen lateral to the tumor (T) throughout their course. Note the dural tail (blue arrow), optic canal extension (white arrowhead), and intimate relationship to cavernous carotid (black arrowhead) typical of TSM.

(A) Preoperative MRI shows expansile, homogenously enhancing tumor with dural tail (blue arrow) that displac-es the infundibulum dorsally (white arrowhead). (B) One year after EEA, MRI shows a normal infundibulum (white arrowhead) and the outline of a well-healed vascularized flap (white arrows).

Figure 2

Amol Bhatki, M.D. (Otolaryngology); Caetano Coimbra, M.D. (Neurosurgery)

Patients with tuberculum sellae meningiomas (TSM) often present with subtle, progressive visual deterioration. These tumors expand the suprasellar space displacing the optic nerves and chiasm; optic canal extension is frequent. TSM typically demonstrate homogenous contrast enhancement, normal sellar dimensions, and dural tails on MRI differentiating them from pituitary adenomas.

Conventional pterional, bifrontal, or orbito-zygomatic crani-otomy requires frontal and temporal lobe retraction, extensive subarachnoid dissection, and facial disassembly. Modern techniques can resolve these shortcomings. The endoscopic endonasal approach (EEA) provides a transnasal corridor obviating brain retraction, neural manipulation, and facial osteotomies. Alternatively, the focused orbito-zygomatic keyhole craniotomy (FOZA) with extradural dissection, a technique developed at the Skull Base Center, provides direct extradural access to the tumor minimizing brain and optic nerve manipulation. The position of the optic nerve defines the appropriate approach.

This report describes two cases that illustrate our modern approach to the treatment of TSM at the Skull Base Center at Baylor University Medical Center at Dallas.

Patient 1: A 41 year-old woman presented with a 1-year history of visual deterioration and a bitemporal visual field deficit. MRI (Figure 1) revealed a sellar and suprasellar mass that enhanced homogenously. The 2.6 cm tumor displaced the infundibulum dorsally and the optic nerve laterally, and extended along a hyperostotic planum sphenoidale.

Because the TSM was medial to the optic nerves, the patient underwent an EEA. Complete tumor excision (Simpson Grade I) was achieved without optic nerve or brain traction. A vas-cularized nasoseptal flap reconstructed the skull base. The patient was discharged on POD#6 and pathology revealed a WHO Grade I meningioma. The patient had total visual recov-ery and normal hormonal function. At 1-year follow-up, there was no evidence of recurrent disease (Figure 2).

Patient 2: A 53 year-old woman presented with similar visual field deficits and headache. MRI again revealed a 2.5 cm enhancing sellar/suprasellar mass. However, this tumor extended lateral to the right optic canal (Figure 3), and would be difficult to remove endonasally without undue nerve traction.

Page 2: Modern Surgical Approaches to Tuberculum Sellae Orbital

mm improvement in proptosis (Figure 3). He returned to his previous employment in full capacity and his vision no longer limited in his fine motor tasks. DISCUSSION At the Baylor University Medical Center at Dallas, a team of oculoplastic and ENT surgeons utilize minimally-invasive surgical techniques to perform more than 50 balanced orbital decompressions annually for patients with clinically significant TED. A unique collaboration of specialists com-bined with endoscopic and image-guidance technology resolves troublesome eye symptoms and restores vision without disfiguring scars, a prolonged recovery, or significant risk of new-onset diplopia.

Figure 3

(A) Pre-operative photograph of patient with clinically signi-ficant thyroid eye disease. Note the bilateral proptosis. Closer inspection reveals scleral injection and stretched eyelids. (B) Post-operative photograph showing resolution of proptosis and scleral injection. Lid closure and corneal dryness are also significantly improved. Lateral eye crease scars are well camouflaged.

mm improvement in proptosis (Figure 3). He returned to his previous employment in full capacity and his vision no longer limited in his fine motor tasks. DISCUSSION At the Baylor University Medical Center at Dallas, a team of oculoplastic and ENT surgeons utilize minimally-invasive surgical techniques to perform more than 50 balanced orbital decompressions annually for patients with clinically significant TED. A unique collaboration of specialists com-bined with endoscopic and image-guidance technology resolves troublesome eye symptoms and restores vision without disfiguring scars, a prolonged recovery, or significant risk of new-onset diplopia.

Figure 3

(A) Pre-operative photograph of patient with clinically signi-ficant thyroid eye disease. Note the bilateral proptosis. Closer inspection reveals scleral injection and stretched eyelids. (B) Post-operative photograph showing resolution of proptosis and scleral injection. Lid closure and corneal dryness are also significantly improved. Lateral eye crease scars are well camouflaged. His eye pain and irritation resolved, and his vision and

proptosis improved dramatically (Hertel = 17 mm) with an 11 mm improvement in proptosis (Figure 3). He returned to his previous employment in full capacity and his vision no longer limited in his fine motor tasks.

At Baylor University Medical Center at Dallas, a team of oculoplastic and ENT surgeons on the medical staff utilize minimally-invasive surgical techniques to perform more than 50 balanced orbital decompressions annually for patients with clinically significant TED. A unique collaboration of specialists combined with endoscopic and image-guidance technology resolves troublesome eye symptoms and restores vision usually without disfiguring scars, a prolonged recovery, or significant risk of new-onset diplopia.

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FIGURE 3

(A) Pre-operative patient with thyroid eye disease. Note the bilateral proptosis, scleral injection, and stretched eyelids. (B) Post-operative photo shows resolution of proptosis and scleral injection. Lid closure and corneal dryness are also significantly improved.

A BEditors

Amol Bhatki, MD, Co-Medical Director and NeurotologistCaetano Coimbra, MD, Co-Medical Director and Neurotologist

Baylor Neuroscience Center Skull Base Center Medical Staff Members

David Barnett, MD, Neurosurgery

Amol Bhatki, MD, Otolaryngology, Skull Base Surgery

Caetano Coimbra, MD, MSc, FACS, Neurosurgery

Yoav Hahn, MD, Neurotologist

Grant Gilliland, MD, Oculoplastic Surgery

Joe Hise, MD, Interventional Neuroradiology

Kennith Layton, MD, Interventional Neuroradiology

Lance Oxford, MD, Otolaryngology, Head and Neck Surgery

Ike Thacker, MD, Interventional Neuroradiology

Skull Base Center Clinical Case Report

For New Patient Referrals:Kim Wiser – Referral Coordinator

Phone: 214.820.3900

Fax: 214.820.3884

Email: [email protected]

Treating Tumors of the Brain, Sinus, and Orbit

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• Continuing EducationPhysicians provide clinical services as members of the medical staff at one of Baylor Scott & White Health’s subsidiary, community or affiliated medical centers and do not provide clinical services as employees or agents of those medical centers, Baylor Health Care System, Scott & White Healthcare or Baylor Scott & White Health. © 2017 Baylor Scott & White Health. BSWNEURO_21_2016 SD

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