Zhang Z, et al. - In patients with deep vein thrombosis (DVT) after primary unilateral total knee and hip arthroplasty (TKA and THA), experts evaluated the incidence and risk factors for post-thrombotic syndrome (PTS). They included patients developing DVT after primary unilateral TKA or THA at our institution between April 2010 and March 2017. Risk factors for PTS included malignancy, previous surgery in ipsilateral lower extremity and blood transfusion. In patients developing DVT after TJA, the incidence of PTS was 9.3%. For patients at high risk of PTS, preventive measures were suggested.