title: Schwannoma (Neurilemmoma) on the Base of the Tongue: A Rare Clinical Case.
abstract: BACKGROUND
  Schwannomas are slow-growing benign tumors. They can arise from any peripheral nerve, including the cranial nerves (except the olfactory and optic nerves), spinal nerves, and autonomic nerves. Schwannomas of the head and neck account for 25-40% of all cases. However, intra-oral schwannomas account for only 1% of all head and neck tumors. Complete surgical excision is the treatment of choice. Malignant transformation and recurrence following this treatment are rare.
  
  
  METHODS
  A 20-year-old woman presented with a slow-growing mass over the back of her tongue first noticed 8 months before. Examination of the oral cavity exposed a 4 × 4 cm mass over the posterior aspect of the tongue. The remaining oral cavity examination was normal, with no cervical lymph node enlargement. The patient underwent excisional biopsy by the trans-oral approach under general anesthesia. Histopathological reports discovered features of schwannoma. The patient was followed up for 1 year; she had an uneventful recovery and no evidence of recurrence. We report a case of schwannoma over the base of the tongue, a rare location for this type of tumor.
  
  
  CONCLUSIONS
  In this article we report a case of schwannoma over the base of the tongue. Despite the rarity of this condition, physicians should consider schwannoma as a differential diagnosis for a mass over the tongue, as there can be a favorable outcome and prognosis for the patient when this condition is correctly identified.
authors.affiliation: Kasturba Medical College, Manipal University, Manipal, India.
authors.forename: Steffi
authors.initials: S
authors.lastname: Sharma
authors.affiliation: Department of Cardiothoracic Surgery, Kasturba Hospital, Manipal University, Manipal, India.
authors.forename: Guruprasad
authors.initials: G
authors.lastname: Rai
mesh_terms: D005260:Female; D006801:Humans; D009442:Neurilemmoma / Q000473:pathology* / Q000601:surgery; D035583:Rare Diseases; D014062:Tongue Neoplasms / Q000473:pathology* / Q000601:surgery; D055815:Young Adult