Giant abdominal sarcoma that caused aortic rupture at the twelfth thoracic level.

There are no previous reports of intraabdominal sarcoma with metastasis to the thoraco-abdominal aorta causing rupture. Here we present the case of a previously healthy 50-year old male who presented to our institution with sudden, sharp back pain. Chest and abdominal computed tomography revealed aortic rupture at the twelfth thoracic level as well as a giant mass in the left upper abdomen. We performed thoracic endovascular aortic aneurysm repair. Histopathology of a biopsy taken from a rib metastasis was thought to be either differentiated liposarcoma or malignant fibrous histocytoma. The patient is currently undergoing chemotherapy. <Learning objective: Abdominal aortic rupture due to direct infiltration of sarcoma has been reported. However, there is no report that the metastasis of sarcoma caused the aortic rupture. Our report indicates the possibility that giant intraperitoneal sarcoma can cause aortic rupture due to para-aortic lymph node metastasis.>.