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MedPix Medical Image Database
COW - Case of the WeekCase Contributor: Richard P. Moser, IIIAffiliation: Walter Reed Army Medical Center
MedPix No: 6722 - HistoryPt Demographics: Age = 22 y.o. Gender = manA 22-year-old man sustained an inversion injury to his left foot one day prior to presentation.
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MedPix No: 6722 - EXAM & LABSThere is mild diffuse swelling about the left ankle and point tenderness to palpation over the base of the left fifth metatarsal bone.
Fracture of the base of the fifth metatarsal
AP, oblique and lateral views of the left foot demonstrate a subtle transverse fracture lucency through the base of the fifth metatarsal at a distance of approximately 5 mm from the tip of the tuberosity. Note that the transverse fracture line is extra-articular and just proximal to the level of the metatarsocuboid joint. There is mild adjacent soft tissue swelling.
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Fracture of the base of the fifth metatarsal
AP, oblique and lateral views of the left foot demonstrate a subtle transverse fracture lucency through the base of the fifth metatarsal at a distance of approximately 5 mm from the tip of the tuberosity (arrows). - Note that the transverse fracture line (arrows) is extra-articular and just proximal to the level of the metatarsocuboid joint. There is mild adjacent soft tissue swelling.
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Fracture of the base of the fifth metatarsal
AP, oblique and lateral views of the left foot demonstrate a subtle transverse fracture lucency through the base of the fifth metatarsal at a distance of approximately 5 mm from the tip of the tuberosity. Note that the transverse fracture line is extra-articular and just proximal to the level of the metatarsocuboid joint. There is mild adjacent soft tissue swelling.
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Fracture of the base of the fifth metatarsal
AP, oblique and lateral views of the left foot demonstrate a subtle transverse fracture lucency through the base of the fifth metatarsal at a distance of approximately 5 mm from the tip of the tuberosity. Note that the transverse fracture line is extra-articular and just proximal to the level of the metatarsocuboid joint. There is mild adjacent soft tissue swelling.
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Fracture of the base of the fifth metatarsal
Lateral view diagram, showing the attachment of the peroneus tendons to the base of the 5th metatarsal. Tension on these ligaments produces the avulsion fracture of the proximal fifth metatarsal.
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FINDINGSAP, oblique and lateral views of the left foot demonstrate a subtle transverse fracture lucency through the base of the fifth metatarsal at a distance of approximately 5 mm from the tip of the tuberosity. Note that the transverse fracture line is extra-articular and just proximal to the level of the metatarsocuboid joint. There is mild adjacent soft tissue swelling.
DIFFERENTIAL DIAGNOSISWhat is your Differential Diagnosis?Lesion at the base of the 5th metatarsal- <li>Jones fracture- <li>Normal apophysis- <li>Avulsion of peroneus brevis tendon- <li>Sesamoid bone
Diagnosis: Articular avulsion fracture, fifth metatarsal baseDx Confirmed by: Clinical and Radiology
DISCUSSIONOK, this is a Radiologic diagnosis and there really is not much of a differential diagnosis. Please refer to the accompanying topic.
