[Changes in immunological capacity of patients with cancer of the large intestine].

The changes of host immunity during the cancer treatment were studied in 27 patients with large bowel cancer. As the result, compared with preoperative status, increasing tendency of serum IgG, IgA levels, normalization of T cell per cent and remarkably lowered CH50 level were found postoperatively. However, in the patients treated with immunochemotherapy, no definite changes were found during the treatment. It was suggested that the CH50 level might have close relation to the curativity or the prognosis in these operative cases.