Maruyama Ayako, Tokumaru Takao, Kitamura Ken
Department of Otolaryngology, Tokyo Medical and Dental University, Bunkyo-ku, Yushima 1-5-45, Tokyo 113-8519, Japan.
J Med Case Rep. 2014 Jun 6;8:178. doi: 10.1186/1752-1947-8-178.
Pleomorphic adenoma accounts for 65 percent of all salivary gland tumors. It has been identified in several anatomical regions, but pleomorphic adenoma arising in the ear canal, first described in 1951, is extremely rare.
A 40-year-old Japanese man's left ear canal was obstructed by a pleomorphic adenoma that caused mild conductive hearing loss. The tumor was resected and he remains disease-free two years after surgery.
Pleomorphic adenoma usually arises from a major and minor salivary gland, but pleomorphic adenoma of the ear canal is derived from the ceruminous gland. We discuss the present case and 37 other case reports in our effort to clarify the clinical features and the course of pleomorphic adenoma in the ear canal.
多形性腺瘤占所有涎腺肿瘤的65%。它已在多个解剖区域被发现，但1951年首次描述的发生于外耳道的多形性腺瘤极为罕见。
一名40岁日本男性的左耳外耳道被一个多形性腺瘤阻塞，导致轻度传导性听力损失。肿瘤被切除，术后两年他仍无疾病复发。
多形性腺瘤通常起源于大涎腺和小涎腺，但外耳道多形性腺瘤起源于耵聍腺。我们讨论了本病例及其他37例报告，以阐明外耳道多形性腺瘤的临床特征和病程。
