Horner's syndrome after placement of a peripherally inserted central catheter.

We describe a delayed case of Horner's syndrome after the use of a peripherally inserted central line. Central vein thrombosis, a well-recognized complication of central venous access, led to temporary injury to the sympathetic tract in the neck. Presentation of Horner's syndrome with central venous access in place should be further investigated to rule out central vein thrombosis.