Pathology of Gestational Trophoblastic Disease

This topic explores the histopathological features that define the spectrum of Gestational Trophoblastic Diseases (GTDs). Zambian medical students will learn to differentiate between complete hydatidiform mole, partial hydatidiform mole, invasive mole, and gestational choriocarcinoma. The module covers macroscopic appearances, such as the 'bunch of grapes' vesicles in molar pregnancy, and microscopic characteristics, including trophoblastic proliferation patterns, villous hydatidiform change, and the presence or absence of fetal tissue. Key differentiating features like karyotype (complete mole: diploid, usually 46XX; partial mole: triploid) and clinical behavior (malignant potential) are emphasized. Understanding this pathology is essential for correlating histological findings with serum β-hCG levels, guiding appropriate management, and predicting the risk of persistent trophoblastic disease or progression to malignancy, which is vital for patient follow-up in Zambian healthcare settings.