| PTL | peritoneal telencephalic leukoencephalomyopathy; pharyngotracheal lumen; plasma thyroxine level posterior tricuspid leaflet; preterm labor |
|---|---|
| PTLA | pharyngeal tracheal lumen airway |
| PTLC | precipitation thin-layer chromatography |
| PTLD | posttransplanatation lymphoproliferative disorder; prescribed tumor lethal dose |