Fig. 2From: Surgical management of primary undifferentiated pleomorphic sarcoma of the rectum: a case report and review of the literatureContrast-enhanced computed tomography revealed a 53 × 58 × 75 mm mass with well-defined boundaries and a heterogeneous contrast effect on the left side of the rectum. Fluid accumulation was observed in the center of the mass, which suggested necrotic tissueBack to article page