<prompt> All of the following hereditary conditions predispose to CNS tumors, exceptNeurofibromatosis 1 2Tuberous sclerosisVon-Hippel-Lindau syndromeXeroderma pigmentosum  <response>: Xeroderma pigmentosum XP is a genetic disorder in which there is a decreased ability to repair DNA damage such as that caused by ultraviolet UV light. Symptoms may include a severe sunburn after only a few minutes in the sun, freckling in sun exposed areas, dry skin and changes in skin pigmentation.it doesnt cause CNS tumors Ref Harrison20th edition pg 2675 