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[Differential diagnosis in "undifferentiated" inflammatory diseases and dyskinesias of the large intestine].

The majority of foreign gastroenterologists have their doubts whether there exist "undifferentiated" colitisis. They consider these to be a variant of the irritable bowel syndrome. We have examined 173 patients. Of these, 67 percent were less than 45 years of age with significant intestinal disorders caused by chronic colitis. Diagnosis of Crohn's disease and nonspecific ulcerative colitis had been excluded. The main complaints of the patients were constipations alternated sometimes with short-time diarrhea (61%), diarrhea (13%), spasmodic pains in the inferior parts of the abdomen (20%), abdominal distention, and rumbling (74%). In 79% there was tenderness in the sygmoid colon and caecum and spasm thereof. Rectoromanoscopy (RRS) revealed normal mucosa of the rectum and sygmoid colon in 70%, proctosygmoiditis (predominantly catarrhal) in 30 percent of cases. In proctosygmoiditis (vs the normal mucosa) motor dysfunctions, disorders of the contrast mass passage through the intestine, gaustrations were more often seen but the relief of the mucosa was intact. Results of morphological investigations of biopsy specimens of rectal and sygmoidal mucosas were compared with endoscopy findings. No histological changes were revealed in 23% patients with proctosygmoiditis whereas in cases of endoscopically normal mucosa moderate inflammation was rarely detectable. Inflammatory changes in the mucosa were to be seen more frequently by cytologic analysis than by biopsy but more rarely than by RRS. In this way, 25% patients with endoscopical diagnosis of proctosygmoiditis had normal cytological picture. The increased amount of intestinal enzymes (enterokynase, alkaline phosphatase) in stools does not permit differentiating the functional and organic types of the disease, but it significantly contributes to endoscopical, morphological, cytological, and clinical data. Our investigations show that "undifferentiated" colitis is a rarity and that one finds difficulty in differentiating between the above condition and the irritable bowel syndrome.