Alongside neurofibromatosis types 1 and 2 (NF1 and NF2), Sturge–Weber syndrome (SWS), von Hippel–Lindau disease (VHL), Incontinentia pigmenti (IP), hereditary hemorrhagic telangiectasia (HHT), ataxia–telangiectasia (A-T), and basal cell nevus syndrome (BCNS), TSC is part of the group of neurocutaneous syndromes. The gene discussed is NF1; the disease is hereditary hemorrhagic telangiectasia.