FIELD: medicine. SUBSTANCE: method involves determining cellular tumor-specific marker, calculating the first percentage ratio including tumor cell number or tumor tissue surface containing the d-interleukine 2 receptor and possessing the cellular tumor marker, calculating the second percentage ratio as cell number possessing the d-interleukine 2 receptor to cell number having an identified tumor phenotype that is determined from one or several properties selected from a group including size, form signs, FALS. Then the first and the second ratios are summed for calculating a coefficient describing cells forming metastasis colonies (Met-CFC) that is proportional to metastasis potential and the metastasis potential is determined. EFFECT: enhanced effectiveness and accuracy diagnosis. 15 cl, 5 dwg, 5 tbl
