title: Granular cell tumor of hypopharynx: report of a rare case.
abstract: Granular cell tumor is a rare tumor, probably of Schwann cell origin. The head and neck are most frequently affected, but hypopharyngeal lesion is extremely rare. We report the seventh case of hypopharyngeal granular cell tumor. Immunohistochemical staining for S100 protein is helpful for the correct diagnosis. There is some possibility of malignancy despite absence of histological evidence, thus the treatment is exclusively surgical resection. The microlaryngoscopic approach is feasible for hypopharyngeal lesions in most cases. Recurrence can occur even after appropriate resection.
authors: Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
authors: Keigo
authors: K
authors: Honda
authors: Shinzo
authors: S
authors: Tanaka
authors: Masanao
authors: M
authors: Kishimoto
authors: Koji
authors: K
authors: Iwai
authors: Hisanobu
authors: H
authors: Tamaki
authors: Ryo
authors: R
authors: Asato
authors: Juichi
authors: J
authors: Ito
mesh_terms: D002245:Carbon Dioxide / Q000008:administration & dosage; D005336:Fiber Optic Technology / Q000295:instrumentation; D016586:Granular Cell Tumor / Q000473:pathology* / Q000601:surgery*; D006801:Humans; D007012:Hypopharyngeal Neoplasms / Q000473:pathology* / Q000601:surgery*; D007828:Laryngoscopy / Q000379:methods; D053685:Laser Therapy / Q000379:methods; D008279:Magnetic Resonance Imaging; D008297:Male; D008866:Microsurgery / Q000379:methods; D008875:Middle Aged
chemical_list: D002245:Carbon Dioxide