Benign colorectal endoscopy: colon tumor, according to the tissue of origin were divided into epithelial and non-epithelial. Epithelial origin of the large intestinal epithelial tissue, vegetation processes on the formation of mucous membrane, known as polyps. Non-epithelial origin question in the wall layers of leaf tissue, a lipoma, leiomyoma, lymphangioma and so on. This article will focus on colorectal polyps.
(1) adenoma: close relationship with colorectal cancer, according to the different shape and decay tend to be divided into tubular, villous and mixed adenomas.
tubular adenoma: the most common, accounting for 80% of the total number of adenomas. Usually pedunculated, endoscopic findings of its shape such as spherical, pear-shaped, smooth or have very shallow fissures, marked hyperemia redness, some bleeding spots visible. Usually about 1cm in diameter, and the larger up to 3cm or more.
villous adenoma: rare, occur in the rectum, sigmoid colon, malignant high rate of up to 40% _50%. The endoscopic findings were largely sessile type, flower-like or cauliflower, a few were Rebagliati Cashmere ball-like surface is not smooth, there are numerous small villous processes, there is congestion, edema, erosion, often with translucent mucus in large amounts, usually larger than 2cm. to solitary common.
mixed adenoma: a duct in the pathology and the fluff of two parts, the majority continue to grow, Department of tubular adenoma, villous epithelial growth occurs the formation of mixed type.
gonads Liubing family: a familial, hereditary diseases, the large intestine characterized by multiple adenomas, the number more than 100 as the standard. Disease and cancer are closely related lesions found in the 20_30 age, around the age of majority, cancer found in the 40-year-old. Endoscopic features, including a large number distributed in the whole colon, tubular adenoma in the main form, the volume are small, sessile or pedunculated spherical, pear-shaped, more than the number of densely distributed almost no normal mucosa, were carpet sample.
multiple adenomas: the large intestine with multiple adenomas, the number not more than 100 to ten the number of stars a few more common. Limitations in dispersion or distribution may occur to tubular adenomas more common, not necessarily familial.
Benign colorectal endoscopy (2) error structure of the polyps
juvenile polyps and juvenile polyposis: occurs in children, 70% of the single, common in the rectum, sigmoid colon, polyps are tough and long pedicle than the spherical shape, pear-shaped, smooth, clear congestion, hemorrhage The type of features.
Poets A Jaeger (Peutz-Jeghers) syndrome: Also known as Peutz-Jeghers syndrome. Have some genetic, some 40% of people have family history, occur in the 20-year-old young people. Mostly multiple polyps, were scattered in the whole gastrointestinal tract, the endoscopic findings in a rare view in more than two or more polyps, the morphology of pedunculated, sessile or Rebagliati, typically by surface is not smooth, fissure to form a furrow in the number of leaflets or bulky uplift, so that kind of polyp formation or gyrus pine tree-like structure, the same color and the surrounding mucosa; no obvious hyperemia. Disease is associated with more pigmentation of skin and mucous membranes, mostly black or dark brown, common in the lips and buccal mucosa around.
inflammatory polyps: is the large intestine secondary to various inflammatory diseases, tumors are not true, it is also known as false polyps. Usually multiple, distributed in the intestinal inflammatory bowel involvement. Most polyps diameter less than 0.5cm, sessile, mung bean or soybean size, surface pale, crisp, inflammation of mucous membrane around the change.