COLON

29-year-old female with colon obstruction secondary to a sigmoid mass.

Microscopic Photo. A tubular adenoma with proliferation of neoplastic tubules.

Microscopic Photo. Colon polyp with proliferation of supercicial hyperplastic crypts. The hyperplastic crypts are slightly dilated with serrated (saw tooth) or star-shaped appearance. H&E Stain.

Microscopic Photo. Rectal polyp biopsy showing proliferation of islands and sheets of monotonous cells in laminar propria. Surface denudation of colon mucosa is also noted. H&E Stain.

Microscopic photo. Rectal biopsy showing haphazardly arranged benign colonic crypts surrounded by fibroblasts and smooth muscle proliferation.

59-year-old male with hematochezia. Colon biopsy is performed and identified multiple mucosal and submucosal white spots.

A 46 yr old male, history of pain in abdomen and weight loss of 15kgs over eight month period.

65-year-old female with hematochezia.

Procedure: Colonoscope with endoscopic polypectomy.

Gross: The specimen consists of 4 tan, irregular tissue fragments, measuring 0.2 to 0.3 cm.