睪丸旁平滑肌肉瘤的影像學表徵：病例報告

Imaging Findings of Paratesticular Leiomyosarcoma: A Case Report

蔡仁明(Jen-Ming Tsai) ； 陳志程(Jyh-Ching Chen) ； 曾建和(Chien-Ho Tseng)

《中華放射線醫學雜誌》 23卷3期 (1998/06) Pp. 113-116

摘要

五十歲男性，兩年前在左側的陰囊處發現無痛性腫瘤，近幾個月覺得有明顯變大，經切除後，病理診斷為睪丸旁的平滑肌肉瘤。病灶在超音波上表現為一混合性的超音波腫塊；於電腦斷層攝影掃瞄(CT scan)為一界限清楚、低密度的腫塊，使用顯影劑後，有少許的對比增強現象；於磁振造影(MRI)的訊號，在T1-weighted images(T1WI)為低訊號強度(hypointensity)，在T2-weighted images(T2WI)為不均勻的高訊號強度(hyperintensity)表現，使用顯影劑後，病灶有明顯的對比增強。超音波、電腦斷層和磁振造影對於診斷睪丸旁的平滑肌肉瘤有很大的幫助，尤其是磁振造影，雖然在本例中腫瘤的訊號並無特異性的表徵，但以其多切面功能及良好的軟組織間對比，對於術前的評估，可提供充足的消息。

關鍵字

陰囊，腫瘤 ； 陰囊，超音波 ； 陰囊，磁振造影

並列摘要

A 50-year-old male with paratesticular leiomyosarcoma of left scrotum was reviewed. The lesion manifested as a palpable, painless mass in the left scrotum with recent gradual enlargement. The final diagnosis was made by pathology after orchietectomy. Clinically, paratesticular leiomyosarcomas were usually noted as a non-tender, non-translumintaed tumor with irregular surface. On sonogram, they were revealed as mixed echogenicity. On CT scan, they were revealed as hypodense. On MRI, they were hypointense on T1W and heterogeneous hyperintense on T2W. They were usually enhanced on postcontrast studies. Sonogram, CT scan and MRI offer great benefits in the diagnosis of paratesticular leiomyosarcoma. Although lesional signal intensity on MRI was not characteristic, MRI offer multiplanar capabilities for the distinction between lesions and adjacent tissue. Thus the surgeon can make a precise preoperative evaluation.

並列關鍵字

Scrotum, neoplasm ； Scrotum, ultrasound ； Scrotum, MR