Abnormal growth of a pleomorphic leiomyosarcoma originating from the mesenteric vein associated with poor outcome after curative-intent resection: a case report.

Regardless of curative-intent surgery for a vessel-derived PLMS, super-early local recurrence and distant metastasis were observed. A vessel-derived PLMS requires further investigation to determine its characteristics and therapeutic strategies to improve long-term prognosis.