International Journal of Head and Neck Surgery

Register      Login

VOLUME 13 , ISSUE 2 ( April-June, 2022 ) > List of Articles


Extracranial Head and Neck Schwannomas: An Institutional Experience

KU Raghavendra Prasad, PR Belure Gowda, MV Vinay Kumar, TS Ramitha

Keywords : Extracranial, Nerve of origin, Schwannoma, Single institution

Citation Information : Prasad KR, Gowda PB, Kumar MV, Ramitha T. Extracranial Head and Neck Schwannomas: An Institutional Experience. Int J Head Neck Surg 2022; 13 (2):63-68.

DOI: 10.5005/jp-journals-10001-1535

License: CC BY-NC 4.0

Published Online: 15-09-2022

Copyright Statement:  Copyright © 2022; The Author(s).


Extracranial schwannomas of the head and neck domain are rare neoplasms. Most of the time, these tumors occur as asymptomatic neck swellings which masquerade as cervical lymphadenopathy, carotid body tumors, bronchial cyst, and vallecular cyst. We present 10 cases of head and neck schwannomas that have been treated and followed up between June 2006 and March 2020 in the Department of Otorhinolaryngology of Hassan Institute of Medical Sciences, Hassan, Karnataka State, India. These patients have been retrospectively reviewed. The main aim of the study is to know the nerve of origin (NOO) preoperatively and on the table. Also to know the unusual sites of schwannoma in the head and neck domain. The age-group between 10 and 50 years and female predominance of 60%. Seven patients presented with neck swelling and three patients with pressure symptoms. Preoperative diagnosis is mainly on clinical suspicion. Radiological imaging like CT scan/MRI may be helpful in diagnosis. FNAC is an adjunctive tool for diagnosis. Among 10 patients NOO could make out in seven patients. Three from the sympathetic, three from the vagus, and one from the internal laryngeal nerve. In three patients, NOO could not make out. Intracapsular dissection of the tumor with preservation of the NOO is the most recent common modality of treatment. Neurological deficit after tumor excision is common in large tumor excision. Early recognition and treatment are best for the preservation of NOO.

PDF Share
  1. Kumar AB, Rajan P. Schwannoma of the tongue– a case report. Calicut Med J 2004;2(2):e4.
  2. Ducatman BS, Scheithauer BW, Piepgras DG, et al. Malignant peripheral nerve sheath tumors. A clinicopathologic study of 120 cases. Cancer 1986;57(10):2006–2021. DOI: 10.1002/1097-0142(19860515)57:10<2006::aid-cncr2820571022>;2-6
  3. Colreavy MP, Lacy PD, Hughes J, et al. Head and neck schwannomas–a 10 year review. J Laryngol Otol 2000;114(2):119–124. DOI: 10.1258/0022215001905058
  4. Zhang H, Cai C, Wang S, et al. Extracranial head and neck schwannomas: a clinical analysis of 33 patients. The Laryngoscope 2007;117(2):278–281. DOI: 10.1097/01.mlg.0000249929.60975.a7
  5. Liu HL, Yu SY, Li GK, et al. Extracranial head and neck schwannomas: a study of the nerve of origin. Eur Arch Otorhinolaryngol 2011;268(9):1343–1347. DOI: 10.1007/s00405-011-1491-4
  6. Katti TV, Anantharao AS, Punyashetty KB. Lingual schwannoma in posterior 1/3 of tongue–a rare presentation. J Evid Based Med Healthc 2014;1(7):529–532. DOI: 10.18410/jebmh/2014/82
  7. Sharma DK, Sohal BS, Parmar TL, et al. Schwannomas of head and neck and review of literature. Indian J Otolaryngol Head Neck Surg 2012;64(2):177–1780. DOI: 10.1007/s12070-011-0248-0
  8. Jadwani S, Bansod S, Mishra B. Intraoral schwannoma in retromolar region. J Maxillofac Oral Surg 2012;11(4):491–494. DOI: 10.1007/s12663-010-0100-1
  9. Gosk J, Gutkowska O, Kulinski S, et al. Multiple schwannomas of the digital nerves and superficial radial nerve: two unusual cases of segmental schwannomatosis. Folia Neuropathol 2015;53(2):158–167. DOI: 10.5114/fn.2015.52413
  10. Gilmer-Hill HS, Kline DG. Neurogenic tumors of the cervical vagus nerve: report of four cases and review of the literature. Neurosurgery 2000;46(6):1498–1504. DOI: 10.1097/00006123-200006000-00036
  11. Ozlugedik S, Ozcan M, Unal T, et al. Cervical sympathetic chain schwannoma: two different clinical presentations. Tumori 2007;93(3):305–307. DOI: 10.1177/030089160709300316
  12. Furukawa M, Furukawa MK, Katoh K, et al. Differentiation between schwannoma of the vagus nerve and schwannoma of the cervical sympathetic chain by imaging diagnosis. Laryngoscope 1996;106(12 Pt 1):1548–1552. DOI: 10.1097/00005537-199612000-00021
  13. Tucker T, Wolkenstein P, Revuz J, et al. Association between benign and malignant peripheral nerve sheath tumors in NF1. Neurology 2005;65(2):205–211 DOI: 10.1212/01.wnl.0000168830.79997.13
PDF Share
PDF Share

© Jaypee Brothers Medical Publishers (P) LTD.