Fig. 4. Microscopic characteristics. A. The tumor is composed of a partly cystic portion and a solid portion (H&E staining, ×20). B. The tumor contains anastomosing cords and strands. At the center of these anastomoses, the cells are loosely arranged and have a cystic appearance. Each cell is spindle-shaped and has hyperchromatic nuclei (H&E staining, ×100).