Roentgen Aspects of Diseases of the Colon
In carcinoma of the colon, the roentgen examination is the most important diagnostic procedure. Diverticulitis, ulcerating processes, polyposis, benign strictures, megacolon, and other diseases which affect the lumenal contour of the colon, although more rarely encountered, are similarly disclosed by this examination. In infectious granulomata, the location and extent of the disease is usually determined by the roentgen examination. The most frequently encountered disturbances of the colon are functional disorders, and the value of the roentgen examination, both from the standpoint of exclusion as well as from the standpoint of furnishing aids to effective treatment, is well recognized.
In the presence of amebiasis, roentgen studies are seldom indicated or helpful, except that they furnish important negative evidence in cases where the diagnosis is unusually difficult. The diagnosis of carcinoma of the rectum is made by the clinical history, digital and proctoscopic examinations. Conditions which are primarily outside the lumen of the colon, such as sarcoma or Hodgkin's disease, or metastases, may give no roentgen evidence of abnormality. This applies to all parts of the gastro-intestinal tube1.
In advanced lesions affecting the lumenal contour of the colon, the interpretation of the roentgen findings is usually obvious. This discussion will emphasize the early roentgen findings as well as the early clinical manifestations of diseases of the colon wherein the roentgen examination is important, in the hope that in the future, the roentgenologist will make examinations earlier in the course of the disease.
The earliest roentgen evidence of abnormal anatomical change in the. . .