患者,男,30岁,因发现左腰部无痛性肿块4年余入院。患者4年前无意中发现左侧腰部有一鸭蛋大小的肿块,无明显疼痛,无局部红肿。一直未予处理,肿块缓慢增大,偶有压迫时不适。既往无外伤史,无结核病史。查体:左腰部可扪及一大小约10.0cm×8.0cm的质软肿块,界欠清,活动度一般,无明显 The patient, male, 30 years old, was hospitalized for more than 4 years because of painless lumps in his left lower back. 4 years ago, the patient inadvertently found a lump on the left lumbar mass, no obvious pain, no local swelling. Has not been addressed, the lump slowly increased, sometimes uncomfortable oppression. No previous history of trauma, no history of tuberculosis. Physical examination: palpable left waist and a size of about 10.0cm × 8.0cm of soft mass, the world is less clear, activity in general, no obvious