患者21岁,大学生,于1990年3月23日入院。入院时主诉一周前无明显诱因突发右腰部绞痛2小时,自行缓解后在校医院拍腹部平片(见图1)发现“膀胱结石”转入院。否认尿频、尿急、尿中断症状。既往无类似发作史。自幼发现右侧阴囊内无睾丸,未诊治。检查:一般情况好。心肺无异常体征。腹部无包块。阴茎及左睾丸、附睾正常。右侧阴囊内空虚,右腹股沟区无睾丸。血、尿常规正常。生化检查,胸透及心电图正常。IVP示双侧肾盂及输尿管正常。膀胱区不透光阴影有1/2位于膀胱之外(顶部)。B超检查:膀胱内无结石;膀胱顶部外后 The patient, 21 years old, was admitted to hospital on March 23, 1990. Admission at a week before the absence of a clear incentive for sudden onset of right angina pectoris 2 hours, self-remission in the hospital filming abdominal plain film (see Figure 1) found that “bladder stones” admitted to hospital. Denied urinary frequency, urgency, urinary symptoms. No previous history of similar attacks. Found in the right scrotum no testes since childhood, not diagnosed. Check: Generally good. No abnormal signs of cardiopulmonary. Abdominal mass. Penis and left testis, normal epididymis. Right scrotum within the empty, right groin area without testicles. Blood, urine routine normal. Biochemical tests, chest and electrocardiogram normal. IVP showed normal renal pelvis and ureter. The ophthalmic area of ​​the bladder area is 1/2 out of the bladder (top). B-ultrasound: no stones in the bladder; the top of the bladder outside