Cellulitis / Kathleen Stergiopoulos -- Fever of unknown origin / Sandra A. Springer -- Human immunodeficiency virus and acquired immunodeficiency syndrome / Sandra A. Springer -- Infectious arthritis / N. Christopher Kelley -- Infectious diarrhea / Avlin B. Imaeda -- Infective endocarditis / David S. Smith -- Meningitis / Lynn E. Sullivan -- Necrotizing fasciitis / Kathleen Stergiopoulos -- Neutropenic fever / Julie R. Rosenbaum -- Osteomyelitis / N. Christopher Kelley -- Pneumonia / David S. Smith -- Septic shock / Jared G. Selter -- Sexually transmitted diseases / Meredith Talbot -- Tick-borne diseases / Lisa Sanders -- Toxic shock syndromes / Lisa Sanders -- Tuberculosis / Stephen E. Possick -- Urinary tract infection and pyelonephritis / Joseph Quaranta -- Viral hepatitis / Stephen E. Possick -- Acute arterial occlusion / Kathleen Stergiopoulos -- Acute myocardial infarction / David S. Smith -- Aortic dissection / David N. Smith -- Arrhythmia / David Litvak -- Cardiogenic shock / Jared G. Selter -- Cardiac arrest / David Litvak -- Chest pain / James N. Kirkpatrick -- Congestive heart failure / Rachel Schoss -- Hyperlipidemia / Gaby Weissman -- Hypertensive crisis / Jennifer L. Yeh -- Pericardial effusion and cardiac tamponade / Seonaid F. Hay -- Valvular heart disease / James N. Kirkpatrick -- Acute respiratory failure / David Litvak -- Asthma / David Litvak -- Pneumothorax / Daus Mahnke -- Hemoptysis / N. Christopher Kelley -- Chronic obstructive pulmonary disease / Anya C. Harry -- Pulmonary embolism / David S. Smith -- Pleural effusion / David N. Smith -- Interstitial lung disease / David J. Horne -- Sarcoidosis / Henry Klar Yaggi -- Acute abdominal pain / David S. Smith -- Acute gastrointestinal bleeding / Lynn E. Sullivan -- Acute mesenteric ischemia / Caroline Loeser -- Acute pancreatitis / Xinqi Dong -- Cholelithiasis and cholecystitis / Haider A. Akmal -- Cirrhosis and portal hypertension / E. Scott Swenson -- Diverticular disease / John Toksoy -- Dysphagia and gastroesophageal reflux disease / Mark Nyce -- Inflammatory bowel disease / Jeffrey D. Kravetz -- Malabsorption / Joseph K. Lim -- Peptic ulcer disease / Daus Mahnke -- Anemia / Holly Craig -- Eosinophilia / Devan L. Kansagara -- Lymphadenopathy and splenomegaly / Caroline Loeser -- Hemoglobinopathies / Ashwin Balagopal -- Hypercoagulable states / Stephen E. Possick -- Hodgkin's disease / Richard Mark White -- Non-Hodgkin's lymphoma / Richard Mark White -- Thrombocytopenia, thrombotic thrombocytopenic purpura, and disseminated intravascular coagulation / Jared G. Selter -- Superior vena cava syndrome / Lynn E. Sullivan -- Spinal cord compression / Kathleen Stergiopoulos --Pancytopenia and aplastic anemia / Melinda M. Mesmer -- Myelodysplasia, leukemia, and blast crisis / Melinda M. Mesmer -- Myeloproliferative disorders / Richard Mark White -- Multiple myeloma / Richard Mark White -- Breast cancer / Meredith Talbot -- Lung cancer / Henry Klar Yaggi -- Colorectal cancer / Richard Mark White -- Esophageal cancer / Michael A. Nelson -- Gastric cancer / Avlin B. Imaeda -- Pancreatic cancer / Richard Mark White -- Renal cancer / Kathleen Stergiopoulos -- Prostate cancer / John Toksoy -- Testicular cancer / Joseph V. Agostini -- Ovarian cancer / Melissa A. Simon -- Primary brain tumors / Vinni Juneja -- Unresponsive patient / David S. Smith -- Seizure and status epilepticus / Stephanie Rosborough -- Stroke and transient ischemic attack / Stephanie Rosborough -- Syncope / Craig G. Gunderson -- Guillain-Barr? syndrome / Gaby Weissman -- Headache / Seonaid F. Hay -- Peripheral neuropathy / Joseph V. Agostini -- Multiple sclerosis / Christopher S. Alia -- Back pain / Beth Anne Biggee -- Myasthenia gravis / Gaby Weissman -- Dementia / Joseph V. Agostini -- Acute delirium / Catherine Chiles -- Mood disorders and suicide / Louis C. Sanfilippo and Vladimir Coric -- Substance abuse, toxicity, and withdrawal / Sandra A. Springer -- Raynaud's phenomenon / Lisa Gale Suter -- Rheumatoid arthritis / Bridget Ann Martell -- Systemic lupus erythematosus / Bridget Ann Martell -- Scleroderma / Nha-Ai Nguyen-Duc -- Dermatomyositis and polymyositis / Beth Anne Biggee -- Temporal arteritis / Joseph V. Agostini -- Seronegative spondyloarthropathies / Christopher B. Ruser -- Vasculitis / Gaby Weissman -- Gout / Beth Anne Biggee -- Fibromyalgia / Lisa Gale Suter -- Anaphylaxis, angioedema, and urticaria / Michael A. Nelson -- Erythema multiforme, Stevens-Johnson syndrome, and toxic epidermal necrolysis / Karen S. Taraszka -- Diabetic ketoacidosis and hyperglycemic hyperosmolar nonketotic state / Amy M. Nuernberg -- Hypercalcemia / Douglas W. Bowerman -- Thyrotoxicosis and thyroid storm / Seonaid F. Hay -- Hypothyroidism and myxedema coma / Lisa Sanders -- Thyroid nodule / Michelle Lee -- Adrenal insufficiency / Christopher S. Alia -- Hyperadrenal states / Amy M. Nuernberg -- Pituitary disorders / Gaby Weissman -- Osteoporosis / Joseph V. Agostini -- Hyperkalemia / Lynn E. Sullivan -- Hypokalemia / Lynn E. Sullivan -- Hyponatremia / Rhuna Shen -- Hypernatremia / Rhuna Shen -- Metabolic acidosis / Jeffrey T. Reynolds -- Acute renal failure / Jeffrey T. Reynolds -- Chronic renal failure / Ursula C. Brewster -- Hematuria and nephrolithiasis / Ursula C. Brewster -- Glomerulonephritis / Vadjista Broumand -- Proteinuria and nephrotic syndrome / Ursula C. Brewster -- Diabetes insipidus / Eric N. Taylor.