title: Pathology quiz case: Metastatic osteosarcoma of the external auditory canal.
authors.affiliation: Taipei Veterans General Hospital and National Yang-Ming University School of Medicine, Taipei, Taiwan.
authors.forename: Chia-Huei
authors.initials: CH
authors.lastname: Chu
authors.forename: Tzong-Yang
authors.initials: TY
authors.lastname: Tu
authors.forename: Anna Fen-Yan
authors.initials: AF
authors.lastname: Li
authors.forename: Wen-Liang
authors.initials: WL
authors.lastname: Lo
authors.forename: Chueh-Chuan
authors.initials: CC
authors.lastname: Yen
mesh_terms: D001706:Biopsy; D001859:Bone Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D003937:Diagnosis, Differential; D004424:Ear Canal / Q000000981:diagnostic imaging / Q000473:pathology; D004428:Ear Neoplasms / Q000175:diagnosis / Q000556:secondary*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D012516:Osteosarcoma / Q000175:diagnosis / Q000556:secondary*; D038781:Otoscopy; D013977:Tibia; D014057:Tomography, X-Ray Computed