Left: 76 year-old woman with iron-deficiency anemia, but no history of bleeding.
Center: Ulcerated carcinoma, one of two separate colonic malignancies found in this 64 year-old woman with rectal bleeding.
Right: Constricting adenocarcinoma of the sigmoid colon in a 61 year-old woman with several months of abdominal pain and rectal bleeding. The lesion was already metastatic to liver and peritoneum.
Left: Nearly obstructing carcinoma in this 86 year-old man with rectal bleeding and anemia.
Center: Large cecal carcinoma in a 91 year-old woman with weight loss, anemia and an episode of melena; she also had a large villous adenoma in the left colon.
Right: Obstructing rectosigmoid adenocarcinoma found in a 59 year-old with squamous cell carcinoma of the cervix.
Left: Adenocarcinoma in an 85 year-old man with anemia and occult bleeding.
Center: Sessile lesion in an 86 year-old man with anemia but no history of bleeding. The lesion was a moderately differentiated adenocarcinoma invasive into muscularis mucosa, and despite its small size, already metastatic to liver.
Right: Extensive sessile carcinomatous mass in the rectum and distal sigmoid colon of a 61 year-old woman with a history of polyps several years previously (but no recent follow-up), who had been experiencing intermittent hematochezia for a year.
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