患者男性，39岁。因排尿困难、排尿痛、有时血尿20余年于1995年5月首次入院。入院后经临床检查及B超、腹部X线平片检查，确诊为“膀胱结石”，因结石巨大，入院后押期在硬膜外麻醉下行耻骨上膀胱切开取石术，手术取出巨大膀胱结石一枚，鹅卵样，米黄色，质硬，表面粗糙呈颗粒状 The patient is male and is 39 years old. He was admitted to hospital for the first time in May 1995 due to difficulty in urination, painful urination, and sometimes hematuria. After admission, he was diagnosed with “bladder stones” by clinical examination and B-ultrasonography and abdominal X-ray examination. Because of the huge stones, he was put on the epidural anesthesia after suprapubic anesthesia for suprapubic bladder incision and stone removal. One, goose-like, beige, hard, rough surface, granular