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患者,男,47岁,1990年8月中旬无明显诱因自觉腹部隐痛,以脐下为著,于左下腹触到一手拳大小的包块,常伴有黑便。于1991年2月1日入院治疗。体检:左下腹可触及一约4cm×3cm大小的包块,边界不清,质硬韧,无压痛。B超检查:左下腹6.2cm×6.2cm肿物。临床诊断:左下腹包块性质待查。于1991年2月9日行肿物切除术。术中见肿物位于空肠肠壁上,表面粗糙湿润,呈结节状,紫黑色,部分与大网膜粘连。病理检查;空肠肿物6cm×7cm×8cm,结节状,质脆,紫黑色。镜检:瘤细胞多为胞浆淡染的大细胞,可见瘤巨细胞,胞浆内有黑色素颗粒。为了进
The patient, male, 47 years old, had no apparent incentive to feel abdominal pain in mid-August 1990. He was under the umbilicus. He touched a fist-sized mass in the left lower abdomen, often accompanied by black stools. He was admitted to hospital on February 1, 1991. Physical examination: A mass of about 4cm x 3cm can be reached in the left lower abdomen with unclear borders, toughness, and tenderness. B-ultrasound: 6.2cm x 6.2cm tumor in the left lower quadrant. Clinical diagnosis: The nature of left lower abdominal mass is unknown. On February 9, 1991, a tumor resection was performed. During the operation, the tumor was located on the intestinal wall of the jejunum, and the surface was rough and moist, showing a nodular, purple-black, and part of it adhered to the omentum. Pathological examination; jejunal mass 6cm × 7cm × 8cm, nodular, crisp, purple black. Microscopic examination: The tumor cells are mostly large cells with light cytoplasm staining. Giant cells are seen in the tumor and there are melanin particles in the cytoplasm. For the sake of