超音波對評估陰囊腫塊是一種有效，非侵入性且安全的方法。本研究是由民國77年10月至民國83年4月針對13名疑似睪丸腫瘤病人回溯調查。病人紼齡由3個月大至69歲（平均年齡33歲）。超音波是選用Acuson XP-128及Aloka機型及7-10MHz高頻率探頭與影像處理系統。所有病人都接受根除性睪丸切除手術，取下之標本皆送病理病切片檢查。陰囊超音波診斷為精細胞癌有3例，非精細胞癌有10例。其中精細胞癌與淋巴癌超音波顯示均勻性質，而非精細胞癌則是非均勻性質。病理報告對於超音波診斷為精細胞癌有1例，惡性淋巴癌有1例，良性病灶有1例。對於超音波診斷為非精細胞癌10例之病理報告為畸胎癌有3例，卵黃囊癌有2例，絨毛細胞癌有2例與良性病灶有3例。我們的結果指出用陰囊超音波可區分精細胞癌與非精細胞癌，但對於良性病灶仍有其限制。

Ultrasonography is an effective, non-invasive and safe method to evaluate scrotal mass. In a retrospective study conducted from October 1988 untill April 1994, scrotal ultrasonography was performed in 13 patients with a suspected testicular tumor. Patients’ ages ranged from 3 months old to 69 years old (mean 33 years). Ultrasonography was performed using an Acuson XP-128 and Aloka with high frequency 7-10 MHz transducer and linear, sector and convex imaging. All cases underwent radical orchiectomy and specimens were subjected to histopathological examination. Ultrasonographic findings led to suspicious of seminomas in 3, and non-seminomatous germ cell tumors (NSGCTs) in 10, respectively. Of that, homogeneous echogenecity appeared in the seminoma-lymphoproliferation group while heterogeneous echogenectity with cystic spaces showed in the NSGCT group. Of the 10 tests suspected by from ultrasonogram of to have NSGCTs, pathology reported of NSGCTs in 8, and benign lesions in 2. Of the three tests suspected of seminoma by ultrasonogram, pathology reported seminoma in one, malignant lymphoma in one and a benign lesion in one. Findings demonstrated that scrotal ultrasonography is a precise method for distinguishing seminoma and NSGCTs. However, its application for differentiating other benign tumorlike lesions is still limited.