 The objective of this study was to evaluate the role of arthritis of the knee joint in the development and progression of varicose veins of the lower extremities. This study consisted of two groups of patients, those with neosteoarthritis, KOA, and those without it. The results showed that KOA was associated with higher rates of varicose veins of the lower extremities, including greater rates of varicose transformation of both saphenous veins and their tributaries, as well as greater rates of varicose transformation of the great saphenous vein and its tributaries. Additionally, KOA was also associated with increased rates of varicose dilatation of the superficial veins of both lower extremities. This article was authored by O. Nemetsota, A. D. Gaybov, S. K. H. Kurbanov, and others.