Abstract
Upper extremity deep vein thrombosis commonly refers to thrombosis of the axillary and/or subclavian veins. This condition may lead to some serious complications like pulmonary embolism if the diagnosis and treatment are delayed. We introduce here one such case where the diagnosis of this rare condition was difficult because of the atypical clinical manifestation but the chylous ascites provided a valuable clue which led to early diagnosis and treatment of this patient.