To define criteria for metastatic involvement of small pelvis lymph nodes, data of 143 patients with histologically verified diagnosis of uterine cervix cancer (UCC) were analyzed. The MRI imaging findings in 31 surgical patients were compared with the resected specimens morphological analyses findings and in 112 patients having enlarged pelvic and retroperitoneal lymph nodes their size along the short axis being 1 cm or more received conservative treatment and with the comprehensive examinations data. The lymph node size criteria appeared to be significant for the lymph node linear size along the short axis being >0.8 cm and the configuration index (then ratio between the lymph node long and short axis) being less 1.47. The UCC stage prolongation was accompanied by an increased linear size along the short axis and a reduced configuration index values when lymph nodes were involved in the metastatic disease. The additional MRI criterion use — absence of hypointense signal from the lymph node fatty hilum made possible improving the diagnosis accuracy up to 92% [CI 80.9—97.4].