Figure 2

Macroscopic and microscopic findings of the tumor. (a) Gross appearance of the tumor. The tumor was divided into two components, component A (round shape) and B (crescent shape). (b) Photomicrograph of the gross appearance of the tumor (Hematoxylin and eosin X 2). (c) Photomicrograph of the component A showing fibrous tissue, small nuclei, and clear nucleoli. (Hematoxylin and Eosin X 40). (d) Photomicrograph of the component B showing more anaplastic features typical of small-cell carcinoma, such as sheets of tightly packed anaplastic cells with round nuclei and scanty cytoplasm. (Hematoxylin and Eosin X 40).