The results of fluorimetric spectral analysis of peripheral blood lymphocytes taken from patients with kidney tumors have suggested that data on the pattern of spectrum and particularly, parameter alpha--a ratio of one-spiral nucleinic acids to two-spiral ones in a cell--may be instrumental in assessing nonspecific resistance in cancer patients and prognosis. Also, these data may be used in working out strategies of treatment and, in particular, to reduce postoperative complications and side-effects of chemo- and radiation therapy. With high values of parameter alpha (0.16-0.4), activation reaction starts to counter stress, causing nonspecific resistance to increase. At lower values of the parameter (0.022-0.048), stress sits in, and nonspecific resistance level drops. Parameter alpha increases as a result of nonspecific activation therapy which leads to lower side-effects and fewer complications of postsurgical and chemoradiation treatment.