“Relocation of the left proximal femoral component with regard to the acetablular component.”

1. Relocate means “move to a new place”; it is not the opposite of dislocate. Reduced is the accepted word to describe this finding.  Proximal is an unnecessary adjective since the whole femur is “relocated” when the dislocation is reduced.

2. In what “regard” is a proximal femoral component relocated other than to the acetablular component?

Possible rewrite: “Reduced prosthetic hip dislocation since the prior exam.”