This document discusses upper extremity deep vein thrombosis (UEDVT) and compares the risks of thrombosis and infection for peripherally inserted central catheters (PICCs) versus central venous catheters (CVCs). Several studies found higher rates of asymptomatic UEDVT in patients with PICCs compared to CVCs, though PICCs may have lower risks of catheter-related bloodstream infections. The risks of pulmonary embolism and post-phlebitic syndrome from UEDVT alone seem clinically less significant than from lower extremity DVT. Treatment guidelines for UEDVT are limited and based on low-quality evidence. Further research is needed to guide management and compare the costs and benefits of PICC placement versus C