Synchronous pancreatic metastasis from extraskeletal mesenchymal chondrosarcoma of the buttock

We here report a rare case of synchronous pancreatic metastasis of soft tissue tumor. A 39-year-old man was referred to our hospital for further examination and treatment of a pancreatic tumor. CT and MRI demonstrated a mass in the pancreatic body, a different tumor on the left buttock, and multiple bone masses. Although biopsies of the pancreatic and buttock tumors were performed, a definitive diagnosis was not reached. He underwent distal pancreatectomy and resection of the buttock mass. The pathological diagnosis was primary extraskeletal mesenchymal chondrosarcoma (EMCS) of the right buttock and pancreatic metastasis. The patient received chemotherapy and radiation thereafter. He died 2 years and 10 months after surgery. Pancreatic metastases derived from soft tissue tumors are rare and this case was considered as the first synchronous pancreatic metastasis of EMCS.