“…A recent meta-analysis of 11 studies that compared the risk of thrombosis related to PICCs with that related to CVCs showed that PICCs were associated with an increased risk of catheter-related thrombosis (CRT) (odds ratio 2.55, 1.54-4.23, p<0.0001) [6]. Because of these concerns, only a few published studies have focused on the clinical usefulness and safety of PICCs in patients with HM, especially in those receiving intensive chemotherapy [2,3,[7][8][9][10][11][12]. A comparison between these published studies and our current study needs to be carefully performed because the population, endpoints, and definitions greatly varied in these previous studies.…”