Рurpose. To demonstrate the possibilities of the ultrasound diagnostic method in identifying the May-Turner syndrome as a cause of the development of varicose veins of the small pelvis and varicose veins of the left lower limb.

Materials and methods. A clinical observation of a 36-year-old patient suffering from chronic pelvic pain syndrome and recurrent varicose veins of the left lower limb is presented. The patient's history was studied, a comprehensive ultrasound assessment of the venous outflow in the system of the inferior vena cava was performed, magnetic resonance phlebography of the inferior vena cava, iliac veins, renal veins, testicular veins and veins of the small pelvis was performed, radiopaque phlebography of the inferior vena cava, iliac veins, and renal veins was performed, testicular veins and veins of the small pelvis, an intravascular ultrasound examination of the left common iliac vein was performed, and stenting of the left common iliac vein with a self-expanding stent was performed.

Results. A comprehensive ultrasound examination of the venous outflow in the system of the inferior vena cava made it possible to assess hemodynamic disorders in the system of the inferior vena cava, to identify the etiological factor in the occurrence of recurrent varicose veins of the left lower limb and chronic pelvic pain syndrome.

Discussion. A timely diagnosis made it possible to determine the further correct tactics for managing the patient and avoid unreasonable repeated phlebectomy from the left lower limb.

A timely diagnosis made it possible to determine the further correct tactics of treating the patient and avoid unreasonable repeated phlebectomy from the left lower limb.

Conclusion. A comprehensive ultrasound examination of the venous outflow in the system of the inferior vena cava allows, at the outpatient stage, to assess the degree of hemodynamic disorders in varicose veins of the small pelvis, including secondary varicose veins of the small pelvis, against the background of arteriovenous conflicts.