Polyp (redirected from Polyp and medusa)

polyp /pol·yp/ (pol´ip) any growth or mass protruding from a mucous membrane.

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adenomatous polyp  a benign neoplastic growth with variable malignant potential, representing proliferation of epithelial tissue in the lumen of the sigmoid colon, rectum, or stomach.

juvenile polyps  small, benign hemispheric hamartomas of the large intestine occurring sporadically in children.

retention polyps  juvenile p's.

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pol·yp (plp) n. A usually nonmalignant growth of tissue protruding from the mucous lining of an organ such as the nose, bladder, or intestine, often causing obstruction. Also called polypus. polyp·oid adj.

polyp peduncular (left)and sessile polyps in a sigmoid colon

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Polyp

A lump of tissue protruding from the lining of an organ, such as the nose, bladder, or intestine. Polyps can sometimes block the passages in which they are found.

Mentioned in: Aspirin, Bowel Preparation, Corticosteroids, Inhaled, Hysteroscopy, Hysterosonography, Nasal Papillomas, Sigmoidoscopy, Smelling Disorders, Stomach Cancer

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polyp (pol´ip),

n a smooth, pedunculated growth from a mucous surface such as from the nose, bladder, or rectum.

polyp, pulp,

n See pulpitis, hypertrophic.

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polyp

1. any growth or mass protruding from a mucous membrane. Polyps may be attached to a membrane by a thin stalk, in which case they are known as pedunculated polyps, or may have a broad base (sessile polyps). They are usually an overgrowth of normal tissue, but sometimes polyps are true tumors or masses of new tissue separate from the supporting membrane. Usually benign, they may lead to complications or eventually become malignant.

Polyps may occur wherever there is mucous membrane: in the nose, ears, mouth, lungs, heart, stomach, intestines, urinary bladder, uterus and cervix. Terminology includes location and/or contents, e.g. adenomatous, fibrous, gastric, tracheal.

2. a sedentary form of hydrozoan, e.g. sea anemone.

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nasal polyp

causes nasal obstruction in sporadic cases. Mycotic nasal granuloma of cattle is manifested by respiratory obstruction and polyps in the anterior part of the nasal cavity. They are eosinophilic granulomas containing spores and hyphae of the fungus Drechslera rostrata. In cats, inflammatory polyps arise from mucosa of the nasal cavity or auditory canal.

nasopharyngeal polyp

occur in cats of any age; inflammatory in origin, they may cause dyspnea, sometimes sneezing.

pharyngeal polyp

cause difficult swallowing and breathing. In cattle they are pedunculated and capable of much movement and erratic clinical signs.