Primary colonic malignant peripheral nerve sheath tumor with biphasic morphology: A case report

Figure 1 Preoperative imaging. A: Abdominal contrast-enhanced computed tomography showing a large, ill-defined heterogeneous mass (approximately 12.0 cm × 10.9 cm × 15.9 cm) extending from the subphrenic region to the gallbladder fossa and portacaval space (orange arrows), with infiltration of nearby liver, duodenum, and pancreatic head; B: Abdominal magnetic resonance imaging revealing a corresponding heterogeneous solid mass (measuring approximately 13.3 cm × 12.4 cm on axial imaging) in the right subphrenic/gallbladder fossa area (orange arrows).