[Prenatal diagnosis of a cardiac tumor resembling Bourneville's tuberous sclerosis].

The antenatal diagnosis of a tumour of the heart after 32 weeks of amenorrhoea made us think Bourneville's tuberous sclerosis. This is a familial condition that had not been noted before and which was confirmed after the birth. The diagnosis and prognostic problems that arise when such tumours are discovered in the heart are considered.