Fetus in fetu: A very rare anomaly

Abstract

Sanjay Choudhuri, Pramod Mohanty, Datteswar Hota

“Fetus in fetu” is a condition seen rarely in the literature, less than 200 cases reported till now. It is a calcified mass or an encapsulated pendunculated tumor thought to be due to unequal division of totipotent cells of a blastocyst, resulting in a small cellular mass in a more mature embryo thus forming a monozygotic, diamniotic twin pregnancy.