Ganglioneuroblastoma arising within a retroperitoneal mature cystic teratoma

Figure 4 Histopathologic findings of the tumor. A: Benign squamous epithelium surrounding the cystic area (right lower part of figure) and ganglioneuroblastoma components (left upper part of figure) were adjacent and closely apposed to each other; B: Microscopic view of the mature, benign part of the ganglioneuroblastoma, showing ganglion cells and nerve fibers (hematoxylin and eosin, × 200); C: the malignant part of the ganglioneuroblastoma composed of neuroblasts (hematoxylin and eosin, × 200).