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Chapter 25
Anus, Rectum, and Prostate
| Term | Definition |
|---|---|
| Fissure | painful longitudinal tear in tissue, e.g., in the superficial mucosa at the anal margin |
| Hemorrhoid | flabby papules of skin or mucous membrane in the anal region caused by a varicose vein in the hemorrhoidal plexus |
| Melena | blood in the stool |
| Pruritus | itching or burning sensation in the skin |
| Steatorrhea | excessive fat in the stool as in gastrointestinal malabsorption of fat |
| Valves of Houston | one of three semilunar transverse folds that cross one-half of the circumference of the rectal lumen |