Periorbital ecchymosis hemotympanum, 1255 Periorbital/orbital cellulitis, 1395 –1396 clinical assessment, 1395 –1396 clinical recognition, 1395 diagnostic testing, 1396 disposition, 1396 evidences, 1395 management, 1396 treatment goals, 1395 Peripheral giant cell granuloma, 350 Peripheral nerve conduction, 692 Peripheral neuromuscular disorders, 480 –481 Peritonsillar abscess (PTA), 508 –509 , 1323 –1325 , 1325 f Peritonsillar and retropharyngeal abscess, 479 Peritonsillar cellulitis, 1324 –1325 Perthes disease, 306 Pertussis, 102 , 105 , 133 –136 , 501 Pesticides, 1065 Petechiae, 77 , 152 –153 , 198 –199 , 219 , 229 , 233 –234 Peutz–Jeghers syndrome, 219 , 352 , 466 PHACE(S) syndrome, 464 Phalanx injuries, 1146 –1148 Pharmaceutical toxicity acetaminophen, 1041 –1043 , 1043 f antihistamines, 1052 cardiac drugs, 1043 –1048 β-Adrenergic blockers (BBs), 1044 calcium channel blockers (CCBs), 1044 clonidine, 1044 –1045 digoxin, 1045 –1046 iron, 1046 –1048 drugs dangerous in small doses, 1053 , 1054 t, 1055 f isoniazid (INH), 1052 –1053 oral hypoglycemic agents, 1053 psychotropic medications, 1049 monoamine oxidase inhibitors (MAOIs), 1049 phenothiazine antipsychotics, 1049 –1050