A case report of mucoepidermoid carcinoma originating from the subsegmental bronchus in a young man with mucoid impaction, with a review of 39 cases under the age of 30 years reported in Japan

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  • Ｍｕｃｏｉｄ　ｉｍｐａｃｔｉｏｎを伴った亜区域気管支発生の若年者肺粘表皮癌の１切除例～３０歳以下の本邦報告３９例の検討～
  • —30歳以下の本邦報告39例の検討—

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Abstract

A 22-year-old man was admitted to our hospital with an abnormal shadow on a chest X-ray. Computed tomography scan revealed a mass shadow with a clear margin, approximately 4 cm in diameter, in the right lower lobe. Bronchoscopy revealed an endobronchial tumor almost completely occluding the orifice of the right B10a. A biopsied specimen of the tumor led to a diagnosis of adenocarcinoma. A right lower lobectomy and LN dissection was performed. The solid tumor was 40×30×30 mm in size and obstructed the right B10a, with mucoid impaction. Histologically, the tumor was a low-grade malignant mucoepidermoid carcinoma. This case is of interest because it originated in the peripheral bronchus, and massive mucoid impaction was seen. We also reviewed the clinical features of 39 cases under the age of 30 years reported in Japan.

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