| PORP | partial ossicular replacement prosthesis |
|---|---|
| PVR | peripheral vascular resistance; perspective volume rendering; poliovirus receptor; postvoiding resid... |
| RCM | radial contour model; radiographic contrast medium; red cell mass; reinforced clostridial medium; re... |
| SIR | single isomorphous replacement; specific immune release; standardized incidence ratio; syndrome of i... |
| TARA | total articular replacement arthroplasty; tumor-associated rejection antigen |