30/07/2026
A 16 year old male patient came to the doctor with a low IQ,poor school performance.He has a history of recurrent seizure .He also noticed a pale macule on the trunk,pink papule over mid face,navie on the lower back.He has a history of difficulty of vision.In addition to this he has tumour on multiple organs.CT scan of head shows calcification of basal ganglia region.What is your diagnosis and which one is the Hallmark feature of this disease?