![]() ![]() Long tubular, curved, present in adenomatous lesions, dysplasia present. Cross or star shaped pattern, larger than normal, typical in hyperplastic polyps. Normal Crypt Pattern, with unbranched glands and with circular orifices arranged at regular intervals. The five categories of the Kudo classification are: This classification is applicable not only to tubular adenomas, but to any other colon polyp (villous adenoma, tubulo-villous adenoma). ![]() The Kudo classification divides tubular adenomas into five different categories according to the glandular pattern observed on endoscopic magnification. They resemble small domes that are attached to the mucosa of the large intestine, reaching considerable dimensions equal to or greater than 5 cm. Sessile tubular adenomas are those that are attached to the mucosa of the colon throughout its base. They resemble a mushroom whose narrow part (foot) is connected to the mucosa of the colon, while the wide part (polyp) is free in the lumen of the intestine connected to it only by the foot. Pedunculated tubular adenomas are those that connect to the mucosa of the colon through a “foot” or “pedicle”. On the other hand, tubular adenomas can be classified according to their microscopic characteristics according to the Kudo classification. Regardless of the type (pedunculated or sessile), tubular adenomas smaller than 1 cm are considered to have a low risk of malignancy, while tubular adenomas larger than 1 cm are more likely to develop colon cancer. Typesįrom the macroscopic point of view, tubular adenomas can be classified into two large groups according to their morphological characteristics Pedunculated tubular adenomas and sessile tubular adenomas.īoth types can be divided into two large groups according to their size: tubular adenomas smaller than 1 cm and tubular adenomas larger than 1 cm. In addition, patients with inflammatory diseases of the colon (ulcerative colitis, Chron's disease) are more likely to develop any type of colon polyp, including tubular adenomas. However, not all tubular adenomas present in the context of a patient with a family history of tubular adenoma In these cases, other risk factors such as excessive alcohol consumption, tobacco use (smoking), obesity and sedentary lifestyle must be considered. Since the genetic factor is so significant, the fact that a person has a blood relative in the first degree (father, mother, brother, son) who has or has presented colon tubular adenoma, significantly increases the risk that that person also the present, in fact there is a very well established hereditary-family pattern. Rarely, the bleeding is large enough that the stool shows blood detectable by direct inspection When this occurs, they are usually very large tubular adenomas that have evolved for several years, with the risk of malignancy being much higher in these cases.Īnother symptom that may occur are changes in the intestinal pattern (quantity, quality and type of evacuations), with diarrhea in many cases, although when a tubular adenoma is large enough it can partially obstruct the lumen of the large intestine. Of the potential symptoms, the most frequent is lower gastrointestinal bleeding, which in most cases is microscopic This means that the patient does not notice anything, being necessary the study of occult blood in stool to be able to identify the hemorrhage. When symptoms do occur (10% of cases), they are usually nonspecific and attributable to multiple causes. 90% of tubular adenomas are asymptomatic a patient may have one or multiple and feel absolutely nothing. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |