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Method A search of patients who had had endoscopic removal of an high grade adenoma was carried out. Patients with the following were excluded: follow-up of less than 1 year, polyposis syndromes, prior colon cancer, and a diagnosis of adenocarcinoma within 6 months following initial diagnosis. Results: 83 patients treated between 1999-2007 for high-grade dysplasia in a colorectal adenoma were identified. Over a median follow up period of 4 years, 53 (64%) developed further adenomatous polyps. Among these, 7% has an adenoma with high-grade dysplasia or an adenocarcinoma. In all these cases the initial high grade adenoma was >1 cm in diameter. Initial follow-up colonoscopy was performed on average 7 months following the initial diagnosis. 10% of patients underwent prophylactic segmental resection and 6% received argon laser therapy. Conclusion: The study demonstrates that patients who have a colorectal adenoma > 1 cm with high-grade dysplasia may be at high risk of developing further adenomas with high- grade dysplasia or carcinoma. Close follow up is warranted.
Pathology, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, United States.
This article was published in the following journal.
Name: Colorectal disease : the official journal of the Association of Coloproctology of Great Britain and Ireland
In some patients with Barrett's esophagus (BE) and a confirmed diagnosis of low-grade dysplasia (LGD), the LGD is not detected during follow-up examinations. We would like to avoid the unnecessary ris...
Mucinous adenocarcinoma (MAC) of the colon and rectum is a histological entity with still indefinite prognostic significance. Although it was previously designated as poorly differentiated by conventi...
Neuroendocrine differentiation in colorectal carcinomas, detected using immunohistochemistry and ultrastructural techniques, has been studied as a prognostic marker for invention of targeted therapy. ...
Although colorectal mucinous adenocarcinomas (MCs) are conventionally regarded as exhibiting high-grade differentiation, they can be divided by differentiation into 2 groups according to the glandular...
Sessile serrated adenomas (SSAs) are the precursors of at least 15% of colorectal carcinomas, but their biology is incompletely understood. We performed a clinicopathological and molecular analysis of...
A Phase III Randomized Trial of Topical Vaginal Fluorouracil (5-Fluorouracil, 5-FU) Maintenance Therapy Versus Observation After Standard Treatment for High-Grade Cervical Dysplasia in HIV-Infected Women
To determine the efficacy and safety of intravaginal fluorouracil administered as prophylaxis in HIV-infected women who have received standard ablative therapy (surgery) for high-grade cer...
RATIONALE: Chemoprevention is the use of certain drugs to keep cancer from forming. The use of ursodiol may in patients with Barrett esophagus or low-grade dysplasia. PURPOSE: This phase ...
A-007 is an investigational therapy which may be effective in the treatment of pre-cancerous cervical dysplasia (abnormal cell growth). The purpose of this study is to evaluate the safety ...
Endoscopic resection of adenomas in the colon is the cornerstone of effective colorectal cancer prevention. Endoscopic mucosal resection (EMR) is currently the most used technique for rese...
to evaluate the acceptability of CT-colonography compared to colonoscopy for the detection of advanced adenomas in subpopulations at high risk of colorectal.
Clusters of colonic crypts that appear different from the surrounding mucosa when visualized after staining. They are of interest as putative precursors to colorectal adenomas and potential biomarkers for colorectal carcinoma.
A tumor of both low- and high-grade malignancy. The low-grade grow slowly, appear in any age group, and are readily cured by excision. The high-grade behave aggressively, widely infiltrate the salivary gland and produce lymph node and distant metastases. Mucoepidermoid carcinomas account for about 21% of the malignant tumors of the parotid gland and 10% of the sublingual gland. They are the most common malignant tumor of the parotid. (From DeVita Jr et al., Cancer: Principles & Practice of Oncology, 3d ed, p575; Holland et al., Cancer Medicine, 3d ed, p1240)
A group of autosomal-dominant inherited diseases in which COLON CANCER arises in discrete adenomas. Unlike FAMILIAL POLYPOSIS COLI with hundreds of polyps, hereditary nonpolyposis colorectal neoplasms occur much later, in the fourth and fifth decades. HNPCC has been associated with germline mutations in mismatch repair (MMR) genes. It has been subdivided into Lynch syndrome I or site-specific colonic cancer, and LYNCH SYNDROME II which includes extracolonic cancer.
A condition characterized by poorly-circumscribed gelatinous masses filled with malignant mucin-secreting cells. Forty-five percent of pseudomyxomas arise from the ovary, usually in a mucinous cystadenocarcinoma (CYSTADENOCARCINOMA, MUCINOUS), which has prognostic significance. Pseudomyxoma peritonei must be differentiated from mucinous spillage into the peritoneum by a benign mucocele of the appendix. (Segen, Dictionary of Modern Medicine, 1992)
A malignant epithelial tumor of glandular tissue, especially the salivary glands, characterized by acini with mucus-producing cells and by the presence of malignant squamous elements. Most mucoepidermoid tumors are low-grade lesions readily cured by adequate excision. They may appear in any age group. They grow slowly. If high-grade, they behave aggressively, widely infiltrating the salivary gland and producing lymph node and distant metastases. (Dorland, 27th ed; from DeVita Jr et al., Cancer: Principles & Practice of Oncology, 3d ed, p575)
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