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Hemolymphangioma is a kind of deformity of the lymphatic vessel and venule,which is rarely seen in clinical practice.A 66-year-old female patient who had a chief complaint of distention in left upper quadrant of the abdomen for 6 months was admitted to the General Hospital of Chengdu Military Region of PLA.Examination of computed tomography and B ultrasound confirmed that the patient had a retroperitoneal cystic mass.During the exploratory laparotomy,the soft mass was found at the left upper quadrant of the abdomen and had invaded to the pancreas.Postoperative pathological examination confirmed that the mass was a pancreatic hemolymphangioma.