Abstract
Patient 1, a 54-year-old man, was admitted to the hospital because of a recurrent retroperitoneal tumor. Six months before admission, the patient was diagnosed as having a retoperitoneal tumor (well differentiated liposarcoma) during a laparotomy for another disease and underwent a tumor resection at another hospital. We successfully removed the tumor 2.3kg in weight. Patient 2, a 77-year-old woman, was found a cystic retroperitoneal tumour during hospitaligation for myocardial infarction. The tumor was removed. Histologicaly, it was schwanoma 1kg in weight. Patient 3, a 71-year-old man, was referred to the hospital because of a recently increasing retroperitoneal tumor. The tumor had been diagnosed at another hospital but the patient let the tumor alone for 17 months, because his left abdominal pain had been relieved. The retroperitoneal tumor 620g in weight (well-differentiated liposarcoma) was removed. Retroperitoneal tumors are apt to be detected as huge masses because they are often silent. In the case of malignant tumor, a risk of recurrence is high so that correct diagnosis and suitable operation are asked to the surgeon.
