Pityriasis rosea (PR), 468 , 471 , 471 f, 642 f, 649 Pityriasis rubra pilaris (PRP), 468 , 471 –472 , 472 f Pityrosporum yeast infections, 438 Plague, 845 Plan-Do-Study-Act (PDSA) cycles, Plant toxicity, 1066 , 1066 t Plaques, 639 –640 Plaque-type psoriasis, 468 Plasma exchange (PLEX), 109 Plasmapheresis, 895 Platelet disorders, 787 –790 Pleural diseases empyema, 1414 –1415 pleural effusion, 1413 –1414 pleural lesions, 1415 pneumomediastinum, 1412 –1413 pneumothorax, 1411 –1412 solid lung, 1415 Pleural effusions, 142 , 369 , 482 , 956 –959 , 957 t, 958 f, 1016 , 1016 f Pleural pain, 366 Pleuritis, 956 –959 , 957 t, 958 f Plexopathy, 249 Plummer–Vinson syndrome, 1409 Pneumocephalus, 1388 Pneumococcal vaccine (PCV), 199 Pneumomediastinum, 332 , 1412 Pneumonia, 135 , 199 , 201 , 480 , 501 , 570 lobar, 133 recurrent episodes of, 1407 Pneumothorax, 68 , 481 , 947 , 947 f, 1275 –1278 , 1277 f bedside ultrasound, 1277 chest radiograph, 1277 chest tube, 1277 –1278 clinical assessment, 1276 clinical recognition, 1276 disposition, 1278 evidences, 1275 –1276