Multiple Cardiac Rhabdomyomas in Dizygotic Twins.

• Cardiac rhabdomyomas are commonly associated with TSC. • They are often the first presentation of TSC, diagnosed prenatally or in neonates. • Fetal or neonatal echocardiography is useful for their early detection. • Familial TSC may be seen even in cases with phenotypically normal parents. • Rhabdomyomas in both dizygotic twins, suggesting familial TSC, is very rare.