the aim of this paper is to introduce new methods of colorectal and anus surgeries. it is not a comprehensive paper and just is a summary of issues related to colon surgeries due to intestinal inflammatory diseases (ulcerative colitis and crohn's disease), and anus cancer. ulcerative colitis usually initiates from rectum and then develops upward to colon. there are three methods of surgery...

Gastric polyps are frequently encountered on endoscopic examinations. While many of these represent true epithelial lesions, some of the polyps may result from underlying stromal or lymphoid proliferations or even heterotopic tissue. Histologic examination is essential for accurate typing of the polyps to predict malignant potential and underlying possible genetic abnormalities. The focus of th...

Familial polyposis is of interest for its own sake as a sort of pathological curiosity and also in relation to the problem of cancer. The term " polyposis " is used to describe a widespread adenomatous proliferation of the intestinal mucous membrane, leading to the formation of multiple adenomata. It should not be applied to intestinal polyps of different histological structure, such as inflamm...

Attenuated familial polyposis (AFAP) is a subset of familial adenomatous polyposis (FAP) that has a relatively benign disease course. AFAP is characterized by no more than 100 colorectal polyps and has a tendency toward rectal sparing, a 20–25-year delay in the onset of adenomatosis and bowel symptoms, a 10–15-year delay in the development of colorectal cancer, and death caused by colorectal ca...

Cyclooxygenase-2 (COX-2), the inducible COX isozyme, plays a key role in intestinal tumorigenesis. We have demonstrated recently that COX-2 protein is induced in the polyp stroma near the intestinal luminal surface in the Apc(Delta716) mouse, a model for human familial adenomatous polyposis, and stimulate tumor angiogenesis. However, the precise cell types that express COX-2 are still to be det...

Aims. To compare methylation profiles, protein expression, and microsatellite instability (MSI) of sporadic, HNPCC, and familial hyperplastic polyps (HPs). Methods. Methylation-specific PCR (MSP) and pyrosequencing assessed p16, MGMT, hMLH-1, MINT 1, and MINT 31 methylation. IHC (Immunohistochemistry) assessed Ki67, CK20, hMLH-1, hMSH-2, and hMSH-6 protein expression. MSI analysis was performed...