Prenatal thrombosis of torcular Herophili with spontaneous resolution and normal outcome.

BACKGROUND: Prenatal thrombosis of torcular Herophili is a rare condition. It may be suspected during the routine ultrasonographic follow-up of the fetus, but MRI is necessary to establish the diagnosis. There are 7 reported cases with various results. METHODS: We report a case of prenatal torcular Herophili thrombosis. We present 2 series of fetal MRIs. The first one was performed at 21 and the second at 37 weeks' gestation. RESULTS: The second MRI revealed a total resolution of the thrombus. The product was a neurologically intact infant with normal development. CONCLUSIONS: This is the fourth reported case of fetal torcular Herophili thrombosis with normal outcome. There are no sufficient data regarding the best management of this rare condition; however, following up with fetal MRIs seems to be the most rational choice.