Malignant gangliocytic paraganglioma of the duodenum with distant metastases and a lethal course

Figure 4 Photomicrographs of the pelvic cavity lesion. A: At low-power fields, the lesion appeared to have an infiltrative margin without necrosis, hemorrhage or invasion of blood vessels; B: At high-power fields, the lesion exhibited an admixture of three types of tumor cells, and epithelioid cells were observed to be arranged in pseudoglandular structures (A: HE staining with original magnification × 100; B: HE staining with original magnification × 400). HE: Hematoxylin and eosin.