Examples of polyp in the following topics:
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- If an adenomatous polyp is found with sigmoidoscopy or if a polyp is found with any other diagnostic modality, the patient must undergo colonoscopy for removal of the polyp(s).
- Even though colon cancer is usually not found in polyps smaller than 2.5 cm, all polyps found are removed since the removal of polyps reduces the future likelihood of developing colon cancer.
- Adenomatous polyps, or adenomas, are polyps that grow on the lining of the colon and which carry a high risk of cancer.
- The other types of polyps that can occur in the colon are the hyperplastic and inflammatory polyps.
- Polyps that are pedunculated (with a stalk) are usually less dangerous than sessile polyps (flat polyps).
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- Animals in this phylum display two distinct morphological body plans: polyp or "stalk" and medusa or "bell" .
- An example of the polyp form is Hydra spp. ; perhaps the most well-known medusoid animals are the jellies (jellyfish).
- The sessile polyp form has, in fact, two types of polyps .
- The larva is free swimming for a while, but eventually attaches and a new colonial reproductive polyp is formed.
- Cnidarians have two distinct body plans, the medusa (a) and the polyp (b).
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- Members of the class Anthozoa display only polyp morphology and have cnidocyte-covered tentacles around their mouth opening.
- The class Anthozoa includes all cnidarians that exhibit a polyp body plan only ; in other words, there is no medusa stage within their life cycle.
- Both gametes are produced by the polyp, which can fuse to give rise to a free-swimming planula larva.
- The larva settles on a suitable substratum and develops into a sessile polyp.
- The sea anemone (a), like all anthozoans, has only a polyp body plan (b).
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- These polyps show limited mobility along the substratum.
- As with scyphozoans, they may bud to form more polyps to colonize a habitat.
- Polyp forms then transform into the medusoid forms.
- The polyp form in these animals often shows a cylindrical morphology with a central gastrovascular cavity lined by the gastrodermis.
- Other species are solitary polyps (Hydra) or solitary medusae (Gonionemus).
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- The defining characteristic of this class is that the medusa is the prominent stage in the life cycle, although there is a polyp stage present .
- These forms may produce additional polyps by budding or may transform into the medusoid form.
- The lifecycle of a jellyfish includes two stages: the medusa stage and the polyp stage.
- The polyp reproduces asexually by budding,while the medusa reproduces sexually.
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- Chronic sinusitis cases are subdivided into cases with polyps and cases without polyps.
- When polyps are present, the condition is called chronic hyperplastic sinusitis.
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- In this symbiotic relationship, these protists provide nutrients for the coral polyps that house them, giving corals a boost of energy to secrete a calcium carbonate skeleton .
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- More than 80% colorectal cancers arise from adenomatous polyps making this cancer amenable to screening .
- The interior surface of the colon shows an invasive colorectal carcinoma and two adenomatous polyps.
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- The common causes are cancer (colorectal cancer, gastric cancer, 2-10%), adenoma or polyps (20-30%), bleeding peptic ulcer, angiodysplasia of the colon, and sickle cell anemia.
- In the event of a positive fecal occult blood test, the next step in the workup is a form of visualization of the gastrointestinal tract by one of several means: sigmoidoscopy, an examination of the rectum and lower colon with a lighted instrument to look for abnormalities, such as polyps; colonoscopy, a more thorough examination of the rectum and entire colon; virtual colonoscopy; endoscopy refers to upper gastrointestinal endoscopy sometimes performed with chromoendoscopy; and double contrast barium enema: a series of X-rays of the colon and rectum.
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- Some sea anemones and some coral polyps also reproduce through fission .
- Coral polyps reproduce asexually by fission, where an organism splits into two separate organisms.