Fetal cardiac rhabdomyoma should trigger the awareness of potential coexisting tuberous sclerosis complex that can lead to a poor neurological outcome. This condition is not only uncommon but can be easily unrecognized prenatally in the absence of a meticulous neurosonogram and MRI. We emphasize that careful consideration of all prenatal facilities is needed to confirm the diagnosis of tuberous sclerosis complex as early as possible during pregnancy. Key words: cardiac rhabdomyoma; tuberous sclerosis; prenatal diagnosis