<prompt> Neurofibromatosis I is most commonly associated with:Brain stem gliomasOptic pathway gliomaSub ependymal pilocytic astrocytomaGlioblastoma multiforme  <response>: Answer is B Optic Nerve Glioma: Optic Gliomas are present in about 15 to 25 of patient with NF-I and its presence is included as one of the criteria in establishing its diagnosis Diagnostic criteria in NFl Optic Gliomas are the most common intracranial tumors of Neurofibromatosis 1- Child Neurology 