PT - JOURNAL ARTICLE AU - Shruti Heda AU - Davala Krishna Karthik AU - Erigaisi Srinivas Rao AU - Anirudda Deshpande TI - Hypoglossal canal schwannoma causing isolated left 12th cranial nerve palsy AID - 10.1136/bcr-2018-225544 DP - 2018 Nov 01 TA - BMJ Case Reports PG - bcr-2018-225544 VI - 2018 4099 - http://casereports.bmj.com/content/2018/bcr-2018-225544.short 4100 - http://casereports.bmj.com/content/2018/bcr-2018-225544.full AB - A 40-year-old woman presented with insidious onset, gradually progressive dysarthria and inability to manoeuvre bolus of food in her mouth while eating. The duration of her symptoms was 3 months. On evaluation, the left half of her tongue was wasted. The tongue deviated to the left on protrusion. There were no clinical features suggestive of involvement of the ipsilateral 9th, 10th or 11th cranial nerves. MRI of the brain showed a large, fusiform lesion in the left hypoglossal canal, extending into the jugular canal. The lesion was surgically excised and found to be a schwannoma.