Clinically, angisarcomas develope in a very short period and make metastasis. In this case, we lost our patient in a four month period. We could not find any sign, seem like malignancy at the first operation. At last, after three months later, when we operated the patient because of an pseudoaneurysm, we found a mass which was adhering to the peritoneum and colon. Patient was operated because of the ileus after 15 days as a third operation and was found a huge mass invading both the abdominal wall and colon. It was not resectable. We lost him in the intensive care unit.