Abstract

We report a 34 year old pregnant women in the fetus of whom a 6×7 mm of homogenious, hyperechoic mass lesion that was supposed to be a rhabdomyoma was observed in the left ventricle at the site of interventricular septum at the 24th gestational week. No extracardiac abnormality was detected at either fetal MRI or postnatal investigations of the urinary system and eye, therefore, tuberous sclerosis was not suspected. Cardiac functions and rhythm was normal and the lesion decreased in size within 3 months after birth.