患者男性，２９岁，因右下腹痛伴腹部包块、消瘦３个月入院。无腹泻、便秘，无粘液脓血便，无畏寒、发热。体查：消瘦，浅表淋巴结未触及，心肺未见异常。右中下腹局限性隆起，可触及一鸭蛋大肿块，质中，压痛，边界欠清，表面光滑，固定。肝脾肋下未及，腹水征阴性。辅助... A 29-year-old male patient was admitted to the hospital with abdominal mass and weight loss for the right lower quadrant abdominal pain. No diarrhea, constipation, no mucus pus and blood, no chills, fever. Physical examination: weight loss, superficial lymph node not touched, no abnormal heart and lung. Right-middle and lower abdomen, limited bulge, can touch a large lump of duck eggs, quality, tenderness, border less clear, smooth surface, fixed. The liver and spleen were not under the ribs and the ascites sign was negative. Assisted...