Unusual MR Imagings of an Incidental Testicular Epidermoid Cyst: A Case Report

偶發睪丸表皮樣囊腫少見的磁振造影影像：病例報告

陳慶陽(Ching-Yang Chen) ； 吳清俊(Ching-Jiunn Wu) ； 林文瓊(Wei-Chiung Lin) ； 鄭煒東(Wei-Tung Cheng) ； 孫光煥(Guang-Huan Sun) ； 陳震宇(Cheng-Yu Chen)

《中華放射線醫學雜誌》 30卷4期 (2005/08) Pp. 251-256

摘要

睪丸表皮樣囊腫通常由身體檢查時意外發現，是一種不常見的睪丸內良性腫瘤。睪丸表皮樣囊腫通常由一個纖維外膜覆蓋，裡面則充滿了角質碎屑，所以它常在超音波和磁振造影表現上是似固態實質的型態。睪丸表皮樣囊腫的磁振造影影像典型表現是靶樣型態。本文有一病例發生右側的急性副睪炎，在做超音波檢查時，意外發現左側睪丸有一個腫塊。這個腫塊在磁振造影影像上呈現少見的純粹水囊狀型態，具有較厚和低訊號的壁。這個腫塊在術前超音波和磁振造影上無法排除良性表皮樣囊腫。這個病人接受腫瘤摘除術，病理報告是表皮樣囊腫。術前正確的超音波和磁振造影診斷，可以提供外科醫師以腫瘤摘除術取代睪丸切除術。

關鍵字

表皮樣囊腫 ； 磁振造影 ； 睪丸

並列摘要

Testicular epidermoid cyst is usually incidentally found during a physical check-up. It is an uncommon intratesticular benign tumor. Because testicular epidermoid cyst is usually encapsulated by a fibrous wall and filled with keratinous debris, it usually appears solid-like on sonographic and magnetic resonance (MR) imagings. Typically, testicular epidermoid cyst has a target appearance on MR imagings. Here we present a case of testicular epidermoid cyst, which was incidentally detected by ultrasound during an episode of acute epididymitis. This mass showed an unusual purely cystic structure with thick wall, which had low signal intensity wall on MR imagings. Benign testicular epidermoid cyst was suspected from the preoperative sonographic and MR study. Enucleation of the testicular mass was done and the final pathologic result was testicular epidermoid cyst. In our case, preoperative imaging findings provided information to the surgeons to attempt testis-sparing surgery instead of orchiectomy.

並列關鍵字

Epidermoid cyst ； Magnetic resonance MR ； Testis