Perigastric extraskeletal Ewing’s sarcoma: A case report

Figure 1 CT scan indicating a tumor at the tail of the pancreas (arrows).

Figure 2 Photograph showing the tumor on the posterior wall of the stomach.

Figure 3 Photograph showing a cross section of the tumor.

Figure 4 Histological appearance of the diffuse neoplastic infiltration showing rather uniform diffuse small round cells and abortive pseudorosette formation (HE, × 112).

Figure 5 Tumor cells showing strong diffuse membrane immuno-histochemical reactivity with CD99 antibodies [labeled streptavidin biotin (LSAB+) method, 3-amino-9-ethyl carbazole (AEC) visualization, × 112].