耳下腺に生じた単形性腺腫 (梁状腺腫)

概要

論文の詳細を見る
A 40-year-old woman became aware of a mass in the parotid gland in October 1984. Superficial lobectomy was carried out on November 8 1984, because the mass was detected within the superficial lobe by CT scan and sialography. Frozen section in operation and postop conventional histopathological examination of the specimen revealed a trabecular adenoma which was classified into “other types” of monomorphic adenoma. Incidence of “other types” described is only 1.8% of all parotid tumors according to Thackray and Lucas. Review of the literature carried out by the authors showed that 41 cases of “other types” of parotid monomorphic adenomas were reported in the last 10 years. Among them, trabecular adenoma was identified only in 3 cases including the present case. Necrotic area seen in the central portion of the tumor in the presented specimen may suggest an initial sign of the cyst formation, which was reported in some previous publications.