HYDATIDIFORM MOLE WITH COEXISTING LIVING FETUS

A pregnancy with a partial or complete hydatidiform mole and a coexist ent living fetus is a rare condition. Most cases are consistent with a twin pregnancy, with distinct borders between placenta and mole on so nography. We report a case with a single placenta with cystic structur es resembling histologically a complete hydatidiform mole. The pregnan cy resulted in a diploid female fetus in the 34th week of gestation wi th marked hypotrophy The non-molar part of the placenta showed a compl ex alteration of villous maturity resulting in intrauterine growth ret ardation but a living fetus. No malignancy occured post partum. The cl inical and pathogenetic aspects of this rare entity are discussed.