A child with mental retardation and skin rash on cheeks underwent a CT scan. The diagnosis of the child is?
In the image on the left adenoma sebaceum is present, which looks like extensive acne in a butterfly distribution. The CT scan head shows a big lesion obliterating the ventricular system. It is a sub-ependymal nodule seen in tuberous sclerosis. A point against Sturge Weber is the absence of cutaneous lesion of Po wine stain. VHL is associated with cerebellar hemangioblastoma.