title: [Clinical study of parapharyngeal space tumors].
abstract: We clinically studied 31 cases of parapharyngeal space tumor treated between 1988 and 2002, and compared histological findings and preoperative diagnosis. Pleomorphic adenoma was the predominant tumor, accounting for 35.5%. Schwannoma and paraganglioma were next at 26.6%. In determining pathological diagnosis, fine needle biopsy and imaging were useful. Important factors in imaging diagnosis are inspecting the degree of enhancement in CT or MRI, investigating the existence of flow void on MRI, and discriminating whether the origin is pre- or post-styloid.
authors.affiliation: Department of Otolaryngology, Tokyo Metropolitan Police Hospital, Tokyo.
authors.forename: Akinori
authors.initials: A
authors.lastname: Kashio
authors.forename: Kazunari
authors.initials: K
authors.lastname: Nakao
authors.forename: Masato
authors.initials: M
authors.lastname: Mochiki
authors.forename: Takaharu
authors.initials: T
authors.lastname: Nito
authors.forename: Masashi
authors.initials: M
authors.lastname: Sugasawa
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006258:Head and Neck Neoplasms / Q000175:diagnosis / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010614:Pharynx