Neurofibromatosis
Gliomas (e.g., optical pathway gliomas, hypothalamic tumors, glioblastoma multiforme, astrocytomas, brainstem glioma) (brain tumors)
Meningioma (a tumor that begins in the brain or spinal cord)
Vestibular schwannoma (a tumor that forms in the nervous system near the ear)
Cancerous tumors