HOW TO DEAL WITH A RARE ENTITY - THE COEXISTENCE OF A COMPLETE MOLE AND A HEALTHY EGG IN A TWIN PREGNANCY

The association of a normal and a molar egg within a twin pregnancy is extremely rare. The key to diagnosis is the fetal karyotype, thus all owing elimination of its principal differential diagnosis: partial tri ploid mole. We report a case where the evolution of the pregnancy was complicated by severe toxemia. Interruption of pregnancy was then nece ssary, even though a conservative attitude had first been considered. Throughout this case, we discuss the means of diagnosis and the clinic al handling of this rare entity.