“…IJVthr is often a complication of head and neck, local skin, and throat infections [ 23 , 24 , 46 , 47 , 48 ], surgery [ 49 , 50 , 51 ], trauma [ 17 ], local or distant malignancy [ 3 , 11 , 25 , 51 , 52 ], central venous catheter placement [ 43 , 44 , 45 ], polycythemia vera [ 37 , 53 , 54 , 55 ], intravenous drug abuse [ 56 , 57 ], neck massage [ 12 ], ovarian hyperstimulation syndrome [ 58 , 59 , 60 , 61 ], hypercoagulable state secondary to factor V Leiden, protein C, protein S, anti-phospholipid syndrome, anti-thrombin III deficiency [ 13 , 14 , 36 , 62 , 63 , 64 , 65 ], or it can be a primary process [ 1 , 3 , 4 , 5 ].…”