Melanosis coli is a well-known occurrence in colonic biopsies. The condition is, however, reportedly absent in both neoplastic and hyperplastic colonic polyps. Herein, we describe its occurrence in 10 hyperplastic colonic polyps, some of which showed melanosis in adjacent biopsied mucosa, and 2 colonic adenomata.
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http://dx.doi.org/10.1177/1066896912468212 | DOI Listing |
Int Med Case Rep J
September 2024
Department of Gastroenterology, Sanai Hospital, Morioka, Iwate, Japan.
Clin Cancer Res
October 2024
Texas Children's Cancer Center, Baylor College of Medicine, Houston, Texas.
SAGE Open Med Case Rep
April 2024
Department of Internal Medicine, School of Medicine, College of Medicine and Health Science, University of Gondar, Gondar, Amhara, Ethiopia.
is a dark to brown pigmentation of the colon due to lipofuscin deposition within the cytoplasm of cells. It is a benign condition associated with excessive use of laxatives, particularly those that are anthracene derivatives and common herbal remedies like Cassia Angustifolla (senna). It is usually asymptomatic and diagnosed incidentally during colonoscopy or histopathologic evaluation.
View Article and Find Full Text PDFIdiopathic mesenteric phlebosclerosis (IMP) is a rare ischemic colitis characterized by calcification of mesenteric veins and submucosal veins of the colon. Melanosis coli (MC) is a pigmented mucosal lesion comprising macrophages in the lamina propria of the colorectal mucosa that contain lipofuscin. This study reports a case of IMP combined with MC.
View Article and Find Full Text PDFFood Chem
January 2024
College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China. Electronic address:
Polyphenol oxidase (PPO) plays a critical role in decrement of shrimp quality. To obtain active PPO and elucidate its enzymatic properties, PPO from Litopenaeus vannamei (Lv-PPO) was cloned, expressed in E. coli and purified by affinity column chromatography.
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