Management of McCleery syndrome and its complication are presented. Over 5-year period, the patient periodically suffered from edema and blue discoloration of skin of the right upper extremity arising after physical exertion and regressing at rest after 20-30 min. Thrombosis of the right subclavian vein occurred after physical exercise on December 5, 2017. On December 11, 2017, the patient underwent regional catheter thrombolysis with alteplase (bolus 5 mg followed by infusion 1 mg/100 ml/h). Thrombolytic therapy for 24 hours resulted clinical improvement. Phlebography confirmed complete lysis of clots. However, subclavian vein deformation and parietal filling defect were found within the right costoclavicular space. Ultrasound with functional tests revealed signs of the right subclavian vein compression by anterior scalene muscle. A month later, transient impairment of venous outflow occurred despite anticoagulation. Considering persistent compression by hypertrophied anterior scalene muscle and transient impairment of venous outflow, the patient underwent right-sided scalenotomy on May 23, 2018. Postoperative period was uneventful. Control ultrasound confirmed no compression. Untimely diagnosis of McCleery syndrome and ignorance of its typical symptoms resulted acute thrombosis of the right subclavian vein in this patient. Thrombolysis and anticoagulation ensured complete recanalization of subclavian vein. However, symptoms of periodic positional obstruction of subclavian vein persisted. Scalenotomy eliminated external compression of the right subclavian vein. Surgical treatment not only significantly improved the patient’s quality of life, but also prevented recurrent venous thrombosis.