Photomicrographs. (a) Haematoxylin and Eosin stain (100×) of a hamartomatous polyp from the descending colon showed proliferation of dilated mucinous glands surrounded by smooth muscle fibers. This latter feature is characteristic of hamartomatous polyps observed in patients with Peutz-Jegher syndrome. (b) Photomicrograph of the left kidney tumor was composed of a solid proliferation of spindle cell with large irregular nucleus, abundant cytoplasm, and prominent mitotic figures. The findings are consistent with a high-grade clear cell renal cell carcinoma, sarcomatoid type.