Malignant neoplasms of the colon

From malignant neoplasms of the colon is more important neck importance cancer.
Most often the cancer is localized in the rectum and sigmoid colon Although in most cases of colon cancer can be detected in normal clinical examination, x-rays and plays a significant role in preoperative recognize the extent of the tumor and related changes. Further down the incidence of tumors follow blind, ascending part and transverse colon.
In the colon mainly found adenocarcinoma, giving uneven growth in the form of irregular units, and the tumor growing in submucosal layer (Fig. 120). Skirr occurs much less frequently. Radiographically these forms are painting expansionist and infiltrating cancer. Suspected the presence of a tumor should be considered areas with impaired raspravljati of the walls of the intestine accompanied with blurred contours. Usually in such places are marked and the corresponding strain relief mucosa.

Fig. 120. Colon cancer (x-ray).
Circular narrowing in the distal part of the sigmoid colon.

X-ray picture of colon cancer is extremely simple in identifying regional, Central or circular filling defect with fuzzy and rough contours. When over in such cases with sufficient accuracy is determined by the presence of mass, its localization and character of the tumor. This will lead to the narrowing of the lumen of the intestine, often with great length. In such cases, the intestine above narrowing place can greatly expanded. Footprints in the defect area becomes hard, uneven eaten. On the border unchanged and pathological tissues are formed pointed ledges.
When expressed filling defects, relevant tumors hilly nature, barium suspension can leave traces in the form of separate spots. Often formed severe ulceration, reaching large size and surrounded by a wall tumor tissue, resembling the picture of the "saucer-like" cancer. Around the defect can be observed spastic changes above and below the narrowing caused by a tumor. In the study the relief of the mucous breakage is observed folds around the tumor, and in the place of its location are formed unevenly hilly tabs deformed mucosa. Particularly important to study the relief of the mucous with small tumors that are in a tight filling and oral examination unavailable to their x-ray detection. In such cases, the best results can be achieved with double contrast study Fisher. In the differential diagnosis of attitude should consider the possibility of inflammatory swelling, especially in the localization of changes in the ileocecal region.
On the way recognition of malignant neoplasms of the colon can be difficult when direct radiological symptoms often poor. In such cases, the functional characteristics, despite their lower reliability, become important in the overall clinical diagnosis related tumors.