[A molar pregnancy coexistent with a viable fetus in a twin pregnancy]. / Gestación molar coexistente con feto viable en una gestación gemelar.

A case of molar gestation associated with an only fetus, both product of an twin gestation is presenting. We analyzed the clinical picture, the diagnostic method, the after birth resolution and evolution of this gestation. The result of a live newborn of 1,300 g and verify coexisting of complete hydatidiform mole.