Sonographic diagnosis of gestational trophoblastic disease and comparison with retained products of conception.

Objective: Gestational trophoblastic disease (GTD) and retained products of conception (RPC) can be difficult to distinguish sonographically. The aim of this study was to determine whether there were any sonographic criteria that could prospectively distinguish one from the other.

Methods: Institutional ethics approval was obtained, and acquisition of consent was waived by the Institutional Review Board.