Main Campus: Chesterfield, MO 63017 | 
Diseases & Conditions
- PA/IVS
- PAC
- PAD
- Paget disease of the bone
- Paget disease of the nipple - male
- Paget disease of the nipple-male
- Pahvant Valley plague
- Pain - back
- Pain - back - chronic
- Pain - CRPS
- Pain medicines - opiate withdrawal
- Painful bladder disease complex
- Painful neuropathy
- Painful urination - noninfectious
- Painless thyroiditis
- PAIS
- Palatal myoclonus
- Palatal tremor
- Palivizumab
- Palmar fascial fibromatosis - Dupuytren
- Palsy - progressive supranuclear
- PAN
- Pancoast syndrome
- Pancreas - inflammation
- Pancreas divisum
- Pancreatic abscess
- Pancreatic cancer
- Pancreatic cancer
- Pancreatic divisum
- Pancreatic endocrine tumor
- Pancreatic insufficiency - chronic
- Pancreatic islet cell tumor
- Pancreatic pseudocyst
- Pancreatitis - children
- Pancreatitis - chronic - discharge
- Pancreatitis - pseudocyst
- Panhypopituitarism
- Panic attacks
- Panic disorder
- Pantothenate kinase-associated neurodegeneration
- Pap smear - dysplasia
- Papillary carcinoma of the thyroid
- Papillary thyroid carcinoma
- Papular acrodermatitis of childhood
- Papulosquamous - pityriasis rosea
- Papulovesicular acro-located syndrome
- Paraganglioma - glomus jugulare
- Paraganglioma - glomus tympanum
- Paraganglionoma
- Parahemophilia
- Parainfluenza
- Paralysis - spastic
- Paralysis agitans
- Paralytic dementia
- Paralytic ileus
- Paralytic ileus - pseudo-obstruction
- Paranoid personality disorder
- Paraphimosis
- Parapneumonic pleural effusion
- Paraquat lung
- Paraquat poisoning
- Parasite infection - hookworm
- Parasite infection - trichinosis
- Parasite infection - visceral larva migrans
- Parasite infection - American trypanosomiasis
- Parasite infection - human African trypanosomiasis
- Parasitic infection - hookworm
- Parasomnia - isolated sleep paralysis
- Parathyroid adenoma
- Parathyroid cancer
- Parathyroid cancer - pheochromocytoma
- Parathyroid carcinoma
- Parathyroid hyperplasia
- Parathyroid-related hypercalcemia
- Parathyroid-related hypocalcemia
- Parinaud oculoglandular syndrome
- Parkinson disease
- Parkinson plus syndrome
- Parkinson's disease
- Parkinson's plus syndrome
- Parkinsonism - secondary
- Paronychia
- Parotitis
- Parotitis
- Paroxysmal cold hemoglobinuria (PCH)
- Paroxysmal nocturnal hemoglobinuria (PNH)
- Paroxysmal supraventricular tachycardia (PSVT)
- Parrot pneumonia
- Pars planitis
- Parsonage Turner syndrome
- Parsonage-Turner syndrome
- Partial (focal) seizure
- Partial androgen insensitivity syndrome
- Partial lung collapse
- Partial penectomy
- Parvovirus B19
- Patau syndrome
- Patches on the tongue
- Patellar tendinitis
- Patellofemoral syndrome
- Patent ductus arteriosus
- Patent foramen ovale
- Patent processus vaginalis
- Paterson-Kelly syndrome
- Pathological gambling
- Pavlik harness
- Pavor nocturnus
- PBC
- PCH
- PCOS
- PCP
- PDA
- PDD
- Pediatric asthma
- Pediatric sleep apnea
- Pediculosis
- Pediculosis - pubic lice
- Pediculosis capitis - head lice
- Pediculosis corporis
- Pediculosis pubis
- Pellagra
- Pelvic abscess
- Pelvic adhesion
- Pelvic floor - stress incontinence
- Pelvic floor hernia
- Pelvic fracture
- Pelvic inflammatory disease - chlamydia
- Pelvic pain - adenomyosis
- Pelvic pain - endometriosis
- Pelvic pain syndrome
- Pelvic prolapse - stress incontinence
- Pelvic relaxation - uterine prolapse
- Pemphigus vulgaris
- Penile cancer
- Penile warts
- Peptic esophagitis
- Peptic esophagitis - children
- Peptic ulcer
- Peptic ulcer - islet cell tumor
- Percocet - opiate withdrawal
- Percutaneous needle fasciotomy - Dupuytren
- Perforated eardrum
- Perforation of the esophagus
- Perforation of the intestines
- Perianal abscess
- Perianal streptococcal cellulitis
- Perianal streptococcal dermatitis
- Periapical abscess
- Periarteritis nodosa
- Pericardial tamponade
- Pericarditis
- Pericarditis - after heart attack
- Pericarditis - constrictive
- Pericarditis - tamponade
- Perichondritis
- Perimenopause
- Perinatal - HIV
- Perinephric abscess
- Periodic disease
- Periodic fever
- Periodic paralysis - hyperkalemic
- Periodic paralysis - hypokalemic
- Periodic paralysis - thyrotoxic
- Periodic peritonitis
- Periodontal disease
- Periodontitis
- Perioral dermatitis
- Periorbital cellulitis
- Periorificial dermatitis
- Peripartum cardiomyopathy
- Peripheral artery disease - legs
- Peripheral neuritis
- Peripheral neuropathy
- Peripheral neuropathy - mononeuritis multiplex
- Peripheral vascular disease
- Peripheral vertigo
- Peripheral vision loss - RP
- Perirectal abscess
- Perirenal abscess
- Peritonitis
- Peritonitis - secondary
- Peritonitis - spontaneous bacterial
- Peritonsillar abscess
- Periungual warts
- Periventricular leukomalacia
- Pernicious anemia
- Peroneal nerve injury
- Peroneal nerve palsy
- Persistent depressive disorder
- Personality disorder - antisocial
- Personality disorder - avoidant
- Personality disorder - borderline
- Personality disorder - borderline
- Personality disorder - dependent
- Personality disorder - histrionic
- Personality disorder - obsessive-compulsive
- Personality disorder - paranoid
- Personality disorder - schizoid
- Personality disorder - schizotypal
- Personality disorders
- Perspiration - excessive
- Perthes disease
- Pertussis
- Pervasive developmental disorder
- Pervasive developmental disorder - Asperger syndrome
- Pervasive developmental disorder - autism
- Pes cavus
- Pes planovalgus
- Pes planus
- Petit mal seizure
- Petrositis
- Peutz-Jeghers syndrome
- Peyronie's disease
- PFO
- PGA II - Hashimoto
- Phagocyte deficiency - chronic granulomatous disease
- Pharyngeal diphtheria
- Pharyngitis - bacterial
- Pharyngitis - sore throat
- Pharyngitis - streptococcal
- Pharyngitis - viral
- Pharyngomaxillary space abscess
- Phenacetin nephritis
- Phenylketonuria
- Pheochromocytoma
- Pheochromocytoma - MEN II
- Philippine hemorrhagic fever
- Phlebitis
- Phlebitis, superficial phlebitis, deep vein thrombosis
- Phlegmasia alba dolens
- Phlegmasia cerulea dolens
- Phobia - simple/specific
- Phobia - social
- Phonological disorder
- Phosphate - low
- Photocoagulation - retina
- Photodermatosis
- PHP
- Phymatous rosacea
- Physical abuse - children
- Physiologic ovarian cysts
- Pica
- Pick disease
- Pickwickian syndrome
- PID - chlamydia
- Pierre Robin anomaly
- Pierre Robin complex
- Pierre Robin sequence
- Pierre Robin syndrome
- Piles
- Pimples
- Pinguecula
- Pink eye
- Pink eye - allergic
- Pink-eye
- Pinworms
- Pipe smoking
- Pitcher's shoulder
- Pituitary adenoma
- Pituitary apoplexy
- Pituitary Cushing disease
- Pituitary Cushing's disease
- Pituitary dwarfism
- Pituitary giant
- Pituitary giant
- Pituitary giant (in childhood)
- Pituitary infarction
- Pituitary insufficiency
- Pituitary tumor
- Pituitary tumor apoplexy
- Pityriasis alba
- Pityriasis rosea
- Pityriasis rubra pilaris
- Pityriasis versicolor
- PJS
- PK deficiency
- PKAN
- PKD
- PKU
- Placenta abruption - definition
- Placental abruption
- Placental dysfunction
- Placental insufficiency
- Plagiocephaly
- Plague
- Plane juvenile warts
- Plantar fasciitis
- Plantar neuralgia
- Plantar warts
- Plaque buildup - arteries
- Plaque psoriasis
- Plasma cell dyscrasia
- Plasma cell myeloma
- Plasmacytoma of bone
- Plasmodium
- Platelet function defects - congenital
- Platelet storage pool disorder
- Pleural effusion
- Pleural effusion - pneumonia
- Pleural fibroma
- Pleural fluid
- Pleurisy
- Pleurisy - purulent
- Pleuritic chest pain
- Pleuritis
- Plummer disease
- Plummer's disease
- Plummer-Vinson syndrome
- PMDD
- PMDD
- PML
- PMLE
- PMS
- PNET - children
- Pneumococcal meningitis
- Pneumococcus - meningitis
- Pneumoconiosis
- Pneumocystis carinii
- Pneumocystis jiroveci pneumonia
- Pneumocystosis
- Pneumomediastinum
- Pneumonia - adults (community acquired)
- Pneumonia - children - community acquired
- Pneumonia - cytomegalovirus
- Pneumonia - eosinophilic
- Pneumonia - hydrocarbon
- Pneumonia - immunocompromised host
- Pneumonia - viral
- Pneumonia - weakened immune system
- Pneumonia in immunodeficient patient
- Pneumonic plague
- Pneumothorax
- Pneumothorax - infants
- Pneumothorax - neonatal
- Pneumothorax dropped lung
- PNH
- Podagra
- Polio
- Poliomyelitis
- Poly-X Klinefelter syndrome
- Polyarteritis nodosa
- Polychromasia
- Polychromatophilia
- Polycystic kidney disease
- Polycystic ovaries
- Polycystic ovary disease
- Polycystic ovary syndrome
- Polycythemia - newborn
- Polycythemia rubra vera
- Polycythemia vera
- Polycythemia with chronic cyanosis - Myelopathic polycythemia
- Polyfollicular ovarian disease
- Polymenorrhea
- Polymenorrhea - dysfunctional
- Polymenorrhea - dysfunctional uterine bleeding
- Polymorphic light eruption
- Polymorphous light eruption
- Polymyalgia rheumatica
- Polymyositis - adult
- Polyneuropathy
- Polyneuropathy - chronic inflammatory
- Polyneuropathy - sensorimotor
- Polyostotic fibrous dysplasia
- Polyps - colorectal
- Pompholyx
- Pontiac fever
- Poor feeding
- Popliteal cyst
- Pork tapeworm
- Porphyria
- Port-wine stain
- Portal hypertension - ascites
- Post-cardiac injury syndrome
- Post-infectious arthritis
- Post-infectious glomerulonephritis
- Post-MI pericarditis
- Post-phlebitic syndrome
- Post-polio syndrome
- Post-radiation enteritis
- Post-splenectomy syndrome
- Post-streptococcal glomerulonephritis (GN)
- Post-thrombotic syndrome
- Post-traumatic stress disorder
- Post-varicella acute cerebellar ataxia
- Postcardiotomy pericarditis
- Posterior circulation ischemia
- Posterior fossa tumor
- Posterior uveitis
- Postmenopause
- Postnatal depression
- Postpartum depression
- Postpartum hypopituitarism
- Postpartum pituitary insufficiency
- Postpartum psychological reactions
- Postpartum thyroiditis
- Postprandial hypotension
- Postural kyphosis
- Pot
- Potassium - high
- Potassium - low
- Potassium wasting
- Potter phenotype
- Potter syndrome
- PPD
- PPH
- Prader-Willi syndrome
- Pre-renal failure - injury, Post-renal failure - injury
- Precancerous changes of the cervix
- Precancerous changes of the cervix - dysplasia
- Precancerous polyps
- Precocious puberty
- Preeclampsia
- Preeclampsia - eclampsia
- Preemie
- Preexcitation syndrome
- Pregnancy - eclampsia
- Pregnancy - hepatitis B children
- Pregnancy - hepatitis C - children
- Pregnancy - HIV
- Pregnancy - IUGR
- Pregnancy and herpes
- Pregnancy mask
- Pregnancy-induced hypertension (PIH)
- Premature atrial contraction
- Premature beats
- Premature closure of sutures
- Premature ejaculation
- Premature infant
- Premature ovarian failure
- Premature separation of placenta
- Premature supraventricular contractions
- Premenstrual dysphoric disorder
- Premenstrual dysphoric disorder
- Premenstrual syndrome
- Premie
- Prepatellar bursitis
- Prerenal azotemia
- Presbycusis
- Presbyopia
- Preseptal cellulitis
- Pressure-related ear pain
- Preterm infant
- Primary adrenal insufficiency
- Primary alveolar hypoventilation
- Primary amenorrhea
- Primary amyloidosis
- Primary biliary cirrhosis
- Primary bone tumor
- Primary cardiac amyloidosis - AL type
- Primary cardiomyopathy
- Primary fibrinolysis
- primary herpetic gingivostomatitis
- Primary hypogonadism - male
- Primary insomnia
- Primary intestinal pseudo-obstruction
- Primary livedo reticularis
- Primary liver cell carcinoma
- Primary lymphoma of the brain
- Primary lymphoma of the central nervous system
- Primary myelofibrosis
- Primary open-angle glaucoma
- Primary polycythemia
- Primary pulmonary hypertension
- Primary sclerosing cholangitis
- Primary syphilis
- Primary thrombocythemia
- Primitive neuroectodermal tumors (PNET)
- Primum ASD
- Prinzmetal's angina
- Prion disease - kuru
- Problem drinking
- Processus vaginalis
- Procidentia
- Proctitis
- Proctitis - streptococcal
- Progeria
- Progressive angina
- Progressive angina
- Progressive massive fibrosis
- Progressive multifocal leukoencephalopathy
- Progressive neuropathic (peroneal) muscular atrophy
- Progressive septic granulomatosis
- Progressive supranuclear palsy
- Progressive supranuclear palsy - supranuclear ophthalmoplegia
- Progressive systemic sclerosis
- Prolactin - secreting adenoma of the pituitary
- Prolactin-secreting adenoma of the pituitary
- Prolactinoma
- Prolactinoma - females
- Prolapsed intervertebral disk
- Prolapsed uterus
- Prolapsing mitral leaflet syndrome
- Prolonged transition
- Pronation of feet
- Prostate - enlarged
- Prostate biopsy
- Prostate cancer
- Prostatism
- Prostatitis - bacterial
- Prostatitis - nonbacterial
- Prostatodynia
- Protein C deficiency
- Protein malnutrition
- Protein S deficiency
- Protein-calorie malnutrition
- Protein-losing enteropathy
- Prothrombin deficiency
- Proximal renal tubular acidosis
- Prune belly syndrome
- Pruritus - exfoliative dermatitis
- PSC
- Pseudo-ainhum
- Pseudo-claudication
- Pseudo-obstruction - intestinal
- Pseudofolliculitis barbae
- Pseudogout
- Pseudohermaphroditism
- Pseudohypertrophic muscular dystrophy
- Pseudohypoparathyroidism
- Pseudomembranous colitis
- Pseudorheumatoid nodule - subcutaneous granuloma annulare
- Pseudotumor cerebri
- Psittacosis
- Psoriasis
- Psoriasis - guttate
- Psoriasis - lichen simplex chronicus
- Psoriasis - psoriatic arthritis
- Psoriasis vulgaris
- Psoriatic arthritis
- PSVT
- Psychosis
- Psychosis - brief psychotic disorder
- Psychosis - schizoaffective disorder
- Psychosis - schizophrenia
- Psychotic depression
- Psychotic disorders - schizophrenia
- Pterygium
- Ptosis
- Ptosis, Dermatochalasis
- PTSD
- Pubertas praecox
- Pubic lice
- Pulicosis
- Pulled elbow
- Pulmonary actinomycosis
- Pulmonary air leak
- Pulmonary alveolar phospholipoproteinosis
- Pulmonary alveolar proteinosis
- Pulmonary arterial hypertension
- Pulmonary arteriovenous fistula
- Pulmonary aspergilloma
- Pulmonary atresia
- Pulmonary atresia - intact ventricular septum
- Pulmonary congestion
- Pulmonary edema
- Pulmonary embolus
- Pulmonary fibrosis
- Pulmonary fibrosis - from asbestos exposure
- Pulmonary heart disease
- Pulmonary histiocytosis X
- Pulmonary hypertension
- Pulmonary infiltrates with eosinophilia
- Pulmonary Langerhans cell granulomatosis
- Pulmonary nocardiosis
- Pulmonary renal syndrome
- Pulmonary stenosis
- Pulmonary tuberculosis
- Pulmonary valve agenesis
- Pulmonary valve stenosis
- Pulmonary vaso-occlusive disease
- Pulmonary veno-occlusive disease
- Pulseless disease
- Pulseless disease
- Pupil-involving third cranial nerve palsy
- Pupil-sparing third cranial nerve palsy
- Pustular psoriasis
- PVACA
- PVB (premature ventricular beat)
- PVC (premature ventricular complex/contraction)
- PVD
- PVL
- Pyelonephritis - adults
- Pyelonephritis - children
- PYGM deficiency
- Pyloric stenosis - infant
- Pyogenic granuloma
- Pyogenic liver abscess
- Pyorrhea - gum disease
- Pyothorax
- Pyruvate kinase deficiency
