The incidence of hepatic hamartomas in tuberous sclerosis. Evaluation by ultrasonography.

Our series of tuberous sclerosis patients consisted of 23 children between 6 and 16 years of age and of 13 patients between 16 and 48 years of age. In the former group the incidence of multiple hepatic haemangiomas, estimated by grey-scale ultrasonography, is 13%, whereas this incidence is 23% in the group of older patients. The sign might be important for genetic counselling in formes frustes.