Syringobulbia is a term which has been clinically applied to brain stem symptoms or signs in patients with syringomyelia. Syringobulbia clefts are found on investigation or at necropsy caused by cutting outwards of the CSF under pressure from the fourth ventricle into the medulla. Hindbrain hernia headache has not been used on its own as a selection criterion neither has syncope nor nystagmus. There were 34 females and 20 males. Forty four patients were available for review. Of the remainder, two had died of unrelated causes and 8 were untraceable or lived an excessive distance away. The age at diagnosis for females was 10-58, a mean of 37-3, and males 18-61, a mean of 44. The symptoms often started many years before diagnosis. The mean follow up period from the original operation was 14-2 years, range 3-39. Thirty four patients had either radiological or clinical evidence of syringomyelia, 20 cases had hindbrain features without syringomnyelia.Skull radiographs show basilar impression in 26 cases and CT scanning and myelography or MRI showed that 46 had tonsillar descent, 28 had a demonstrable syrinx in the spine. Two did not undergo CT scanning, myelography or MRI.All patients had CVD. The technique included a small craniectomy decompressing the tonsils usually by removing the arachnoid and often by sucking away part of the tissue of the tonsils, and always stitching the dura back and leaving it widely open. Five patients had ventriculo-atrial shunting (VEA) following postoperative deterioration, one of these had a syringopleural shunt at the time of the CVD and two had late syringopleural shunting.At review each patient completed a questionnaire and had a neurological and otolaryngological (ENT) examination.