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人，男，３岁。无诱因的出现双下肢疼痛、小便不畅、大便困难，呈“里急后重”感１０余天。无发冷、发烧及血尿。查体：发育正常，下腹部轻度压痛，直肠指诊：直肠前壁受压后突，可扪及一６．０ｃｍ×６．０ｃｍ大小的肿物，实验室检查均在正常范围。胸透：心肺正常。Ｂ超：膀
Man, male, 3 years old. There was no inducement of pain in the lower extremities, poor urination, and difficulty in bowel movements. No chills, fever and hematuria. Physical examination: normal development, mild tenderness in the lower abdomen, digital rectal examination: the anterior wall of the rectum is compressed and can be swollen with a size of 6.0 cm x 6.0 cm. Laboratory examinations are in the normal range. Chest: normal heart and lung. B ultrasound: bladder