[Fiber colonoscopic and histomorphological characteristics of true polyps of the large intestine].

By fibrocolonoscopy, fibrocolonoscopic biopsy, polypectomy, operation resp., one hundred and eight true polypi in the colon of 75 patients were studied, grouped according to localization: in caecum -- 2.8 per cent, in ascending colon -- II.

[Changes in the large intestine after cholecystectomy].

Aiming at the establishment of the type and incidence of morphological and tonometric large intestine changes post cholecystectomy--64 patients were examined, 36 aged up to 50 and 28 over 50 by means of rectoromanoscopy, transrectoscopic biopsy, X-ray examination (passage and irigoscopy), balloon signography and anal tonometry. Morphological changes--catarrhal type (34.38%) were established to originate often in large intestine post cholecystectomy.

[Origin of rectosigmoid cancer from precancerous processes].

Three hundred sixty two patients with rectosigmoid cancer are examined by rectoromanoscopy and biopsy in order to establish those of them with manifestations of a proceeding precancer process. Cancer, originated on the base of single polypus was established in 50,94 per cent and 7,54 per cent in relation with preceeding generalized polyposis, in 30,19 per cent malignant villose tumor is concerned, in 4,71 per cent -- cancer, originated on the base of preceeding ulcerohemorrhagic proctocolitis and in only 1,91 per cent -- malignant chronic fibrosclerosed hemorrohoids. Precancer process is established in 29,29 per cent in all of the examined 362 patients with rectosigmoid cancer and in 70,71 per cent of the cases no manifestations of preceeding precancer disease was established, i.