Metastatic clear cell sarcoma of the pancreas: A rare case report

Figure 1 Abdominal computer tomograph showed a 3. 2 cm × 3.0 cm round lesion in the tail of the pancreas, which was uneven and mildly enhanced under enhanced scan. A: The boundary between the posterior margin and the pancreas was not clear, and was not combined with the pancreatic duct; B: Multiple lymph nodes were also seen in the mesentery area, with the width of about 1.3 cm for the largest one.

Figure 2 Magnetic resonance imaging showed an abnormal blocky signal found in the pancreato-gastric space, with a size of about 3. 1 cm × 2.9 cm × 2.7 cm. The boundary between the local lesion and the pancreatic body was not clear. A: T1W1 showed equal and slightly lower signal; B: T2W1 showed a slightly higher signal. The enhanced scan showed progressive uneven enhancement.

Figure 3 The malignant tumor of the pancreatic body was accompanied by massive necrosis. A and B: Hematoxylin and eosin (H&E) showed tumor cells arranged in nests (A; × 10), with fibrous and vascular separation around the nests (B; × 20); C: The cells were oval or polygonal, with obvious nucleoli, and some cytoplasm was lightly stained or vacuolated (H&E, × 40); D-F: No metastasis was found in the surrounding lymph nodes and no tumor involvement was found in the resection margin. Immunohistochemical results: AE1/3 (-), CD56 (-), CgA (-), CK8/18(-), HMB45(+), Melan-A (+) (D), Ki-67 (60%+), S-100 (+)(E), SOX10 (+)(F), syn (-), β-catenin (+), PR (-).