• Paget's Disease of Bone

• Pain

• Palpitations

• Pancreatic Cancer

• Pancreatic Cysts

• Pancreatic Insufficiency

• Pancreatitis

• Panhypopituitarism

• Panic Disorder

• Paralytic Ileus - See Intestinal Obstruction

• Paranasal Sinuses and Nasal Cavity Cancers - See See Head and Neck Cancer

• Parathyroid Cancer

• Parkinson's Disease

• Paronychia

• Patellofemoral syndrome - See Runner's Knee

• Patent Ductus Arteriosus

• PE - See Pulmonary Embolism

• Pediculosis - See Lice

• Pelvic Inflammatory Disease

• Pemphigus Vulgaris

• Peptic Ulcer

• Pericarditis

• Pericarditis, Constrictive - See Constrictive Pericarditis

• Periodontal Disease

• Peripheral Nerve Disorders

• Peripheral Vascular Disease

• Peritonitis

• Personality Disorders

• Pertussis

• Phantom Limb Pain

• Phenylketonuria

• Pheochromocytoma

• Piles - See Hemorrhoids

• Pilonidal Cyst or Sinus

• Pink Eye - See Conjunctivitis

• Pinworms

• Pituitary Tumor

• Pityriasis Rosea

• Placenta Accreta

• Placenta Previa

• Placental Insufficiency

• Plague

• Plantar Fasciitis

• Plasma Cell Myeloma

• Platelet Disorders - See Acquired Platelet Function Defect

See Congenital Platelet Function Defects

• Pleural Effusion

• Pleurisy

• Pneumocystis Infections

• Pneumomediastinum

• Pneumonia

• Pneumonitis

• Pneumothorax

• Poison Ivy, Poison Oak, & Poison Sumac

• Poisoning

• Polio & Post-Polio Syndrome

• Polyarteritis Nodosa

• Polycystic Kidney Disease

• Polycystic Ovary Syndrome

• Polycythemia Vera

• Polymyalgia Rheumatica and Giant Cell Arteritis

• Polymyositis

• Porphyria

• Portal Hypertension

• Postpartum Hemorrhage

• Posttraumatic Stress Disorder

• Prader-Willi Syndrome

• Preeclampsia

• Premature Birth

• Premature Labor

• Premenstrual Dysphoric Disorder

• Premenstrual Syndrome

• Presbyopia

• Pressure Sores - See Bedsore (Pressure Ulcer)

• Proctitis

• Progressive Multifocal Leukoencephalopathy

• Progressive Supranuclear Palsy

• Prolapsed Intervertebral Disk

• Prostate Cancer

See also: Prostate Cancer Screening

• Prostatitis

• Protein-Losing Enteropathy

• Pseudogout

• Psittacosis

• Psoriasis

• Psoriatic Arthritis

• Psychological Stress

See also: Posttraumatic Stress Disorder

• Psychosis

• Ptosis

• Pubic Lice - See Lice

• Pulmonary Edema

• Pulmonary Embolism

• Pulmonary Eosinophilia

• Pulmonary Fibrosis

• Pulmonary Hypertension

• Pulmonary Sarcoidosis - See Sarcoidosis

• Pulmonary Stenosis

• Pulmonary Thromboembolism - See Pulmonary Embolism

• Pyelonephritis - See Kidney Infection

• Pyloric Stenosis