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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/12/23 23:47:48」(JST)
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| Pseudopolyps |
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| Colonic pseudopolyps of a patient with intractable ulcerative colitis. Colectomy specimen. |
| Classification and external resources |
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Pseudopolyps are projecting masses of scar tissue that develop from granulation tissue during the healing phase in repeated cycle of ulceration (especially in inflammatory bowel disease). Inflammatory tissue without malignant potential,[1] pseudopolyps may, according to Joffe (1977), represent either regenerating mucosal islands between areas of ulceration, edematous polypoid tags or granulation tissue covered by epithelium. There are reported cases when localized giant pseudopolyposis resulted in intestinal obstruction.[2]
Residual mucosal islands between ulcerated and denuded areas of mucosa may have a polypoid appearance and are referred to as pseudopolyps.[3] Polyposis syndromes, such as familial adenomatous polyposis, could give rise to a similar appearance on imaging, although the clinical presentation would differ from that of inflammatory pseudopolyposis.[4]
Numerous, confluent ulcerations with bulging of the edematous residual mucosa determine a cobblestone appearance at endoscopy.[5][6]
References
- ^ Ulcerative Colitis: Pseudopolyps; http://www.endoatlas.com/ib_uc_03.html
- ^ http://bjr.birjournals.org/content/51/610/782.full.pdf
- ^ Utility of High-Resolution MR Imaging in Demonstrating Transmural Pathologic Changes in Crohn Disease, Rakesh Sinha, MD, et al; http://radiographics.rsna.org/content/29/6/1847.full.pdf+html
- ^ NEJM, Inflammatory Pseudopolyposis in Crohn’s Disease, http://www.nejm.org/doi/pdf/10.1056/NEJMicm020629
- ^ Atlas of Gastroenterological Endoscopy, Crohn´s disease. http://www.endoskopischer-atlas.de/k43e.htm
- ^ http://medical-dictionary.thefreedictionary.com/Cobblestone+Appearance
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Japanese Journal
- PATHO-Words(パソ・ワーズ)講座 : 病理のことばを読み解こう(Vol. 6)炎症性腸疾患
- SPT:大腸の小扁平病変に対する新しい内視鏡的摘除法
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- pseudopolyp [soo″do-pol´ip] a hypertrophied tab of mucous membrane resembling a polyp, but caused by ulceration surrounding intact mucosa. pseu·do·pol·yp (sū'dō-pol'ip), A projecting mass of granulation tissue, large numbers of ...
- pseudopolyp pseu·do·pol·yp (sōō'dō-pŏl'ĭp) n. A projecting mass of granulation tissue, such as the masses that may develop in ulcerative colitis.
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