Palatal myoclonus Pancreas divisum Pancreatic abscess Pancreatic endocrine tumor Pancreatic pseudocyst Pancreatitis Panic attacks Panic disorder with agoraphobia Papillary carcinoma of the thyroid Parainfluenza Paralysis agitans Paranoid personality disorder Paranoid schizophrenia Paraphimosis Parapneumonic pulmonary effusion Paraquat lung Parathyroid adenoma Parathyroid cancer Parathyroid hyperplasia Parathyroid-related hypercalcemia Parkinsonism - secondary Parotitis Paroxysmal cold hemoglobinuria (PCH) Paroxysmal nocturnal hemoglobinuria (PNH) Paroxysmal supraventricular tachycardia (PSVT) Passive-aggressive personality disorder Patau syndrome Patent ductus arteriosus Patent foramen ovale Paterson-Kelly syndrome PBC PCP Pelvic floor hernia Pemphigus vulgaris Perianal streptococcal cellulitis Periarteritis nodosa Pericarditis Pericarditis - bacterial Perichondritis Periodic paralysis - thyrotoxic Periodic paralysis with hypokalemia Perioral dermatitis Periorbital cellulitis Perirenal abscess Peritonitis - secondary Peritonitis - spontaneous Personality disorder - schizoid Personality disorders Pertussis Petrositis Peutz-Jeghers syndrome Pharyngitis Pharyngitis - streptococcal Pharyngitis - viral Pharyngomaxillary space abscess Phenylketonuria Phlebitis Phlegmasia cerulea dolens Phobia - simple/specific Phobia - social Phonological disorder Pica Pierre Robin syndrome Pinguecula Pitchers shoulder Pituitary apoplexy Pituitary tumor Pityriasis alba Pityriasis rosea Pityriasis rubra pilaris Pityriasis versicolor Placenta previa Placental dysfunction Plantar fasciitis Plaque psoriasis Pleurisy Plummers disease PMDD PML PMS Pneumonia - viral Pneumonia in immunocompromised host Pneumothorax - tension Polychromatophilia Polycystic ovarian syndrome (PCOS) Polymorphic light eruption Polymyalgia rheumatica Polymyositis - adult Polyneuropathy - sensorimotor Portacaval shunt Post-splenectomy syndrome Post-traumatic stress disorder Posterior circulation ischemia Posterior tongue carcinoma Potter syndrome Prader-Willi syndrome Precocious puberty Preeclampsia Preemie Preexcitation syndrome Premature ejaculation Presbyopia Primary hypogonadism - male Primary sclerosing cholangitis Primary syphilis progressive massive fibrosis Prolactinoma - males Prostatitis - acute Proximal renal tubular acidosis Psychosis Pterygium Pulmonary vaso-occlusive disease Pulseless disease Pyruvate kinase deficiency