PT - JOURNAL ARTICLE AU - Leonard V. Petrus AU - W. W. M. Lo TI - Spontaneous CSF Otorrhea Caused by Abnormal Development of the Facial Nerve Canal DP - 1999 Feb 01 TA - American Journal of Neuroradiology PG - 275--277 VI - 20 IP - 2 4099 - http://www.ajnr.org/content/20/2/275.short 4100 - http://www.ajnr.org/content/20/2/275.full SO - Am. J. Neuroradiol.1999 Feb 01; 20 AB - Summary: In two patients with surgically proved CSF fistula through the facial nerve canal, MR and CT examinations showed smooth enlargement of the geniculate fossa with CSF signal. In the clinical setting of CSF otorrhea or rhinorrhea, the presence of an enlarged labyrinthine facial nerve canal and enlarged geniculate fossa on CT scans and CSF intensity on MR images strongly suggests a CSF fistula through the facial nerve canal.