In the name of GOD

Gestational Trophoblastic Neoplasms

(GTN)

Dr. Yousefi . Z

GTN is divided into three histologic categories :

hydatidiform mole , invasive mole (chorioadenoma destruens) choriocarinoma .

Partial hydatidiform moles Placental site trophoblastic tumors (PSTT)

All derived from the human placental trophoblast and the paternal genome

Human chorionic gonadotropin (hCG) is secreted by these neoplasms and serves as a sensitive tumor marker that correlates well with the clinical course for all GTNs except PSTT.

The initial histologic features of any lesion identified as GTN are less important than the clinical data and hCG level.

Complete Hydatidiform MoleMacroscopically : Edema and swelling of

virtually Villi without identifiable fetal parts or amniotic

membranes

Microscopically: The chorionic villi are hydropic with marked interstitial edema . fetal vessels are absent

Proliferation of cytotrophoblast and syncytiotrophoblast

Complete moles: completely paternal chromosomal composition . most are 46,XX

An empty egg by a haploid sperm followed by reduplication

Empty ovum + 2323 endoreduplication 46xx Homozy yous

Clinical finding :

1-One third to one half of uterine enlargement

2-Vaginal bleeding

3-Theca lute in cysts 20%

5-pregnancy – induced hypertension

4-pulmonary decompensation

6-hyperthyroidism

7-snowstorm (ultrasonography)

Partial mole partial moles often are associated with

identifiable fetal parts or amniotic membranes one haploid maternal and two haploid

paternal sets of chromosomes

diagnosis :

until after evacuation of the pregnancy

complete moles : 10% to 30% incidence of malignant

partial mole : fewer than 5% of the patients

Invasive mole

with invasion into the myometrium without intervening endometrial stroma

uterine perforation and hemorrhage

choriocarcinoma

choriocarcinoma rapidly invades the myometrium and uterine vessels , and systemic metastasis

no chorionic villi are identified hematogenous embolization (affinity of trophoblast cell for blood vessel) Most cases have no tissue for pathologic

study, hCG level has raise

50% of cases are preceded by hydatidform mole

Gestational choriocarcinoma has been observed several years after last known pregnancy .

Spontaneous regression of the primary uterine site

Placental site trophoblastic tumor Locally invasive neoplasms derived from

intermediate cells of the placenta HPL from cytotrophoblast cell small amounts of hCG rare systemic metastasis significantly more resistant to standard

chemotherapy than other forms of GTN hysterectomy is the initial therapy of choice

Risk factors for hydatidiform mole

1-prevous molar pregnancies 2-maternal age

advanced maternal age , younger women or adolescents

Animal fat Deficiency of folat –caroten and protein

Low socioeconomic state

Management GTD

complete physical and pelvic examinations complete blood count determination blood chemistry levels , including renal-liver baseline serum hCG level chest radiograph pelvic ultrasonography

Evacuation: suction dilation and curettage hysterectomy followed closely after hysterectomy incidence of malignant sequelae: after 20%

after suction D&C to

less than 5% after hysterectomy

Follow-up

B-hCG levels every 1 to 2 weeks

Until hCG level is undetectable After the first normal level for 2 to 4 weeks Every then 1 to 2 months for 6 months Oral contraceptives

Hydatidiform mole

(compiete or

parial )

Evacuation by suction D&C

(hysterectomy only sterllization

desired )

Monitor serum B-hCG

weekly Good contraception

hCG returns to negative

hCG levels q

month X 6

May again attempt pregnancy if

desired

hCG plateaus or

rises

Exclude new pregnancy

Stage and treat with chemotherapy

Algorithm for diagnosis and treatment of a patient with hydatidiform mole

Hysterectomy only if sterillzation desired After completion of 6 months of hCG normal

level pregnancy if desired False – positive hCG Test Results

The heterogeneity of hCG and the variability between different hCG assays may in

False – positive test results . Presence of heterophilic antibodies

After evacuation of hydatidiform mole

(9% to 36%) of patients requiring therapy

Pattern of hCG regression If hCG level plateau or raise for 3 or more

consecutive weekly levels appearance of metastatsis

higher frequency of post molar malignant GTN

1-Trophoblastic proliferation

2-Uterine enlargement

3- Theca lute in cysts

4- Respiratory distress syndrome after molar evacuation

5- post evacuation uterine hemorrhage

Persistent GTD irregular vaginal bleeding Theca lute in cysts Uterine sub involution Persistently elevated serum hCG level

Clinical classification of malignant gestational trophoblastic neoplasia

Nonmetastatic GTN A. Not defined in terms of good versus poor

prognosisMetastatic GTN Good prognosis (i.e., absence of high-risk factors )Pretreatment serum B-hCG level < 40,000 mIU/mlLess than 4-month duration of symptoms

attributable to disease No evidence of brain or liver metastasis No significant prior chemotherapy No antecedent term pregnancy

Poor pregnosis (i.e., any single high-risk factor )

pretreatment serum B-hCG level >40,000 Iu/ml

more than 4-month duration of symptoms attributable to disease

brain or liver metastasis or both

failed prior chemotherapy

antecedent term pregnancy

Malignant GTN distant metastases Gastrointestinal urologic hemorrhage Hemoptysis Neurological symptoms due to cerebral

hemorrhage Clinical hyperthyroidism

Four principal pulmunary radiologic patterns snowstorm pattern (Alveolar pattern )

Discrete rounded densities Plural effusion Embolic pattern

Management :

Physical and pelvic examinations Baseline hCG level Chest radiograph Pelvic ultrasonography

CT of brain , chest , and abdomen –pelvis Exclude an uterine pregnancy

Stage I

Stage II

Stage III

Stage IV

Strictly confined to uterine corpus

Extends outside the uterus , but limited to genital structures

Extends to the lungs with or without genital tract involvement

All other metastatic sites

Sub stages assigned for each stage as follows :

A: no risk factors present

B: One risk factor

C: Both risk factors

Risk factors used to assign substages :

1- pretherapy serum hCG> 100,000 mIU/ml

2- Duration of disease > 6 months

Who Orgnaization prognostic scoring system for gestational trophoblastic neoplasia

Prognostic factor 0 1 2 4

Age <39 >39 _ -

Antecedent pregnancy Hydatidiform Abortion , ectipic Term pregnancy -

Interval (months) <4 4-6 7-12 >12

hCG level (IU/liter) <10 10-10 10-10 >10

ABO blood groups (female/male)

O/A B A/O AB

Largest tumor (cm) <3 3-5 >5 _

Site of metastasis _ Spleen, kidney Gastrointestinal tract, liver Brain

Number of metastases _ 1-3 4-8 >8

Prior chemotherapy _ _ Single drug Multiple druge

The total score is obtained by adding the individual scores for each prognostic factor . Total score :<4 , low risk ; 5-7 , intermediate risk ;>8 , high risk .Interval :between antecedent pregnancy and start of chemotherapy.

WHO Scoring systemScore :

<4,low risk 5-7 mid risk>8 , high risk

Chemotherapy alone is successful in curing 85% of patients with non metastatic and good-

prognosis

Hysterectomy rarely is indicated as Initial therapy for women with malignant GTN

Persistence of a lung nodule after hCG normalization Should not necessarily surgery

Whole-brain and whole-liver irradiation

in conjunction with chemotherapy

protocol for treatment of GTDStage I single agent chemotherapy Resistant combination chemotherapy or

hysterectomy with adjuvant chemotherapy

Stage II,III low risk single agent chemotherapy high risk combination chemotherapy Resistant second line chemotherapy

Stage IV combination chemotherapy radiotherapy Resistant second line chemotherapy

liver 2,000 rd therapy prevent hepatic hemorrhage selective occlusion of the hepatic artery

Response during therapy

Weekly intervals during therapy After remission hCG levels in the normal level Every 1 month First year of surveillance .

Follow up Molar pregnancy 6 month

GTN 1year

Met static GTN

Except lung 2 year

Recurrence rates after therapy for GTN have been 3% to 2.6%

Late complication

Slight increase in the incidence of spontaneous abortion

Repeat molar 1% ovarian failure as a result of prolonged multi

drug chemotherapy

Low incidence of congenital malformations The incidence of placenta accreta particular , appears to be increased

After first pregnancy We should be a chest radiography . Serum BhCG after 6-8 weeks of post partum Placenta should be undergo pathology