History: A 50 year old woman had polyps identified on routine colonoscopy. This polyp was resected from the rectum. What is your...

History: A 12 year-old boy was referred for evaluation of hyperthyroidism. He had a multinodular thyroid with multiple lesions similar to...

Left: This tumor of pituicytes is composed of spindle-shaped cells in fascicles. Right: The tumor cells stain for vimentin, S-100...