CNRI / SCIENCE PHOTO LIBRARY CNRI / SCIENCE PHOTO LIBRARY
Cancerous rectal polyp. Light micrograph of a section of the rectum, showing a cancerous polyp. The rectum is the final part of the large intestine before the anus. Polyps are protruding growths from a mucous membrane. The one seen has become cancerous (malignant). Cancers of the tissues Thar form the linings (epithelium) of the mouth, nose and intestines are known as carcinomas. Magnification unknown.
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