[Reoperations in primary rectal cancer].

The authors studied the results of repeated radical operations performed in 73 patients who had been subjected earlier to exploratory and palliative operations. During repeated interventions radical operations were conducted on 54 (74%) patients which were of a combined character in 11 (20.4%) of them.

[Radioimmunological determination of tumor markers in the diagnosis of recurrences of rectal cancer].

The levels of tumor markers were determined in 173 patients with rectal cancer recurrences by radioimmunoassay. An increase in a CEA level was observed most frequently (92.5%).

[The combined radionuclide diagnosis of rectal cancer recurrences].

Of 153 patients with confirmed rectal cancer CEA was recorded in 139 (90.8%); erroneous results were noted in 14 (9.2%) patients; in scintigraphy with 67Ga-citrate and 111In-bleomycin diagnoses coincided in 147 (96.

[Carcinoembryonic antigen in the evaluation of the effectiveness of surgical treatment in cancer of the rectum].

The carcinoembryonic antigen content (CEA) was studied in 163 patients who had been subjected to surgical treatment. The content of antigen in blood plasma was determined by the radioassay. It is shown that a high pre- and postoperative CEA level may be indicative of the spread of the neoplastic process, nonradical character of the treatment, and an unfavourable prognosis.

[Scintigraphy with 67Ga-citrate and 111In-bleomycin in cancer of the rectum].

Scintigraphy with 67Ga-citrate and 111In-bleomycin was performed in 26 patients with primary rectal cancer, 176 patients with suspected recurrent tumors, and in 34 patients without clinicoroentgenological signs of cancer recurrence. A focus of higher accumulation of these radionuclides in the rectal area was recorded in all 26 patients. Of 176 patients with symptoms of recurrence tumors were detected by means of ultrasonic and computed tomography of the small pelvis in 158 patients.