Twin‐twin transfusion syndrome complicated by single ventricle physiology: A case report

Abstract

Twin-twin transfusion syndrome is known to occur in twin pregnancies from unequal shunting in the conjoined placenta. This in utero phenomenon may result in anemia and oligohydramnios in one twin and polycythemia and polyhydramnios in the other. 1 Postnatal twintwin transfusion syndrome (TTTS) has been previously described in a set of conjoined twins from unequal shunting through communicating vessels. 2 Here, we describe TTTS observed when one twin has a single ventricle physiology (Twin B) and the other has a structurally normal heart.