良性囊性间皮瘤罕见,国内尚无报道。我所最近收到秦皇岛市医院病理科送来会诊一例,报告如下。病例介绍患者男性,15岁。主因腹部包块一月余,伴钝痛四天,于1981年11月23日住某院。查体,体温正常,贫血面容。左腹部可触及一巨大肿块,其上界在肋弓内,内侧达腹中线,下界至左髂前上棘。触之有囊性感。余各系统无异常发现。化验,白细胞23,200/mm~3,中性91％,淋巴7％,单核1％,嗜伊红1％,血红蛋白8克％。尿常规阴性。住院一周后,行剖腹术。术中见肿物来自腹膜后,不活动,囊性。上至膈肌,下达盆腔,呈哑铃形,表面光滑,与邻近器官无粘连,较易剥离。未发现转移。遂行肿物切除术。标本为囊性肿物,23×21× Benign cystic mesothelioma is rare and has not been reported in China. Our institute recently received one case from the Department of Pathology, Qinhuangdao Hospital. The report is as follows. Case presentation Patient male, 15 years old. Mainly due to abdominal masses more than a month, with dull pain for four days, lived in a hospital on November 23, 1981. Physical examination, normal temperature, anemia face. A massive mass can be touched in the left abdomen. The upper border is in the costal arch, with the medial midline of the abdomen and the lower border to the anterior superior iliac spine. Touched sexy. There was no abnormality in each system. Laboratory tests showed that the white blood cells were 23,200/mm~3, neutral 91%, lymphatic 7%, mononuclear 1%, eosinophilic 1%, and hemoglobin 8g%. Urinary negative. One week after admission, laparotomy was performed. During the operation, the tumor was found to be from the retroperitoneum, inactive, and cystic. From the diaphragm to the pelvic cavity, it is dumbbell-shaped and has a smooth surface. It does not adhere to adjacent organs and is easily peeled off. No transfer was found. He underwent tumor resection. The specimen is a cystic mass, 23×21×