Preschooler who is immune suppressed with a fever who had their catheter replaced 9 months ago

CT of an embolized fibrin sheath from a central venous catheter
CXR shows no evidence of pneumonia, but suggests the presence of a tubular structure in the inferior aspect of the left hilum that was not present on a prior CXR obtained before the catheter was replaced. Coronal image from a CT with contrast of the chest better demonstrates the high density tubular structure.

The diagnosis was an embolized fibrin sheath from the prior catheter which was determined by an angiogram.