**4.5. Umbilical cord teratomas**

They are rare benign lesions, only 12 cases reported in the literature, which may lead to adverse fetal outcomes. These tumors are the only true neoplasms of the umbilical cord which have a very polymorphic presentation and should be evaluated when the lesion contains calcifications [55].

It can also be associated with severe fetal anomalies such as anencephaly, intestinal anomalies, and abdominal wall defects. The outcome in extragonadal teratomas can be affected by the presence of associated anomalies and surgical complications after correction of the congenital malformations [56].

Angiomyxomas are benign solid masses which may be associated with fetal demise. Associated complications are premature delivery, cardiovascular anomalies, nonimmune hydrops fetalis, hydatidiform mole, polyhydramnios, and stillbirth [57]. The management of pregnancy with angiomyxoma in the third trimester is not well defined.
