Facial NerveArachnoid Cyst of the Fallopian Canal: A Surgical ChallengeIsaacson, Jon E.*; Linder, Thomas E.†; Fisch, Ugo‡Author Information *Department of Otolaryngology–Head and Neck Surgery, Milton S. Hershey Medical Center, Hershey, Pennsylvania, U.S.A.; †Department of Otorhinolaryngology–Head and Neck Surgery, University Hospital of Zürich, Zürich, Switzerland; and ‡ORL-Zentrum, Klinik Hirslanden, Zürich, Switzerland Address correspondence and reprint requests to Dr. Ugo Fisch, ORL-Zentrum, Klinik Hirslanden, Witellikerstraβe 40, CH-8029 Zürich, Switzerland. E-mail: email@example.com Otology & Neurotology: July 2002 - Volume 23 - Issue 4 - p 589-593 Buy Abstract Objective Spontaneous cerebrospinal fluid (CSF) leaks from the fallopian canal are exceedingly rare, with only 6 reports appearing in the world literature. We report a seventh case that is unique in that it involves an arachnoid cyst of the fallopian canal and an associated facial nerve palsy. Study Design Case report. Setting International tertiary care referral center. Conclusion CSF otorhinorrhea associated with a facial nerve palsy may be indicative of an arachnoid cyst of the fallopian canal. These fistula are extremely rare. Surgical management involves sealing the fistula while preserving facial nerve function and is extremely challenging. © 2002 Lippincott Williams & Wilkins, Inc.