睾丸卵黄囊瘤极罕见、多数发生于3岁以下的小儿,其声像图特征报道甚少。我院B型超声检测成人睾丸卵黄囊瘤1例,经手术病理证实。患者男,23岁,未婚,发现睾丸肿大明显伴疼痛一个月。超声检查左阴囊内探及6.5×5.1×4.5cm椭圆形肿块,轮廓清晰、周边光滑,内部呈中等强度回声,较均匀。右侧睾丸大小及回声正常。超声提示:左侧睾丸实质占位病变(睾丸肿瘤)。92年10月9日手术切除左侧睾丸肿瘤9×5×4cm,切面 Testicular yolk sac tumor is extremely rare, most of which occur in children under 3 years of age, the sonographic features reported little. B-mode ultrasound in our hospital adult testicular yolk sac tumor in 1 case, confirmed by surgical pathology. Male patient, 23 years old, unmarried, found that testicular swelling was significantly associated with pain for a month. Ultrasound examination of the left scrotum and exploration 6.5 × 5.1 × 4.5cm oval mass, clear outline, smooth periphery, the internal was moderate-intensity echo, more uniform. Right testicular size and echo normal. Ultrasound Tip: The left testicular mass lesions (testicular tumors). October 9, 92 Surgical removal of the left testicular tumor 9 × 5 × 4cm, section