Syndrome of inappropriate antidiuretic hormone secretion in a patient with intrasellar neurofibroma of the sixth nerve

The syndrome of inappropriate antidiuretic hormone (SIADH) secretion has been described in a wide range of neurological and other disorders. We wish to add an extremely rare case of a solitary, large invasive neurofibroma of the sixth cranial nerve extensuvely destroying the sella turcica in the skull base and causing inappropriate secretion of antidiuretic hormone in a 44-year-old black man in the absence of neurofibromatosis.