SECTION I Diseases and Disorders Abdominal Aortic Aneurysm, 3 Abruptio Placentae, 7 Absence Seizures, 9 Acetaminophen Poisoning, 10 Achalasia, 11 Acne Vulgaris, 14 Acoustic Neuroma, 18 Acquired Immunodeficiency Syndrome, 19 Acute Bronchitis, 27 Acute Coronary Syndrome, 29 Acute Glomerulonephritis (AGN), 35 Acute Kidney Injury, 39 Acute Liver Failure, 44 Acute Lower Gastrointestinal Bleeding, 48 Acute Lymphoblastic Leukemia (ALL), 50 Acute Mesenteric Ischemia, 53 Acute Myelogenous Leukemia (AML), 56 Acute Pelvic Pain in Women, 60 Acute Respiratory Distress Syndrome (ARDS), 62 Acute Tubular Necrosis, 66 Acute Urinary Retention (AUR), 68 Adrenal Insufficiency, 70 Alcohol Abuse, 72 Alcoholic Hepatitis, 76 Aldosteronism (Hyperaldosteronism, Primary), 78 Allergic Rhinitis, 80 Alopecia, 81 Alzheimer''s Disease, 84 Amaurosis Fugax, 87 Amyotrophic Lateral Sclerosis, 88 Anaerobic Infections, 90 Anaphylaxis, 91 Anemia, Autoimmune Hemolytic, 92 Anemia, Inflammatory, 95 Anemia, Iron Deficiency, 97 Anemia, Pernicious, 99 Angina Pectoris, 101 Angioedema, 107 Ankylosing Spondylitis, 109 Anorexia Nervosa, 111 Antibody-Mediated Autoimmune Encephalitis, 113 Antiphospholipid Antibody Syndrome, 114 Anxiety (Generalized Anxiety Disorder), 117 Aortic Dissection, 118 Aortic Regurgitation, 122 Aortic Stenosis, 126 Appendicitis, 130 Arrhythmogenic Right Ventricular Dysplasia, 133 Asbestosis, 136 Ascariasis, 137 Ascites, 138 Aspergillosis, 142 Aspiration Pneumonia, 145 Asthma, 147 Astrocytoma, 158 Atelectasis, 160 Atopic Dermatitis, 161 Atrial Fibrillation, 164 Atrial Flutter, 169 Atrial Myxoma, 173 Atrial Septal Defect, 175 Atrioventricular Dissociation, 178 Attention Deficit Hyperactivity Disorder, 181 Autism Spectrum Disorder, 183 Autoimmune Hepatitis, 185 Autosomal Dominant Polycystic Kidney Disease (ADPKD), 188 AV Malformations, Cerebral, 191 Avascular Necrosis, 193 Babesiosis, 196 Barrett Esophagus, 199 Basal Cell Carcinoma, 202 Bedbug Bite, 205 Bell Palsy, 207 Benign Paroxysmal Positional Vertigo, 209 Benign Prostatic Hyperplasia (BPH), 212 Binge Eating Disorder (BED), 214 Bipolar Disorder, 216 Bite Wounds, 218 Bites and Stings, Arachnids, 220 Bites and Stings, Insect, 221 Bites, Snake, 223 Bladder Cancer, 227 Bladder Pain Syndrome, 230 Bone Tumor, Primary Malignant, 232 Brain Abscess, 234 Brain Metastases, 236 Brain Neoplasm, Benign and Low Grade, 238 Brain Neoplasm, Glioblastoma, 240 Breast Abscess, 241 Breast Cancer, 242 Bronchiectasis, 247 Brugada Syndrome, 249 Budd-Chiari Syndrome, 252 Bulimia Nervosa, 255 Burns, 257 Cancer of Unknown Primary, 261 Candidiasis, Cutaneous, 263 Candidiasis, Invasive, 265 Carbon Monoxide Poisoning, 267 Cardiac Tamponade, 269 Cardiomyopathy, Chemical-Induced, 271 Cardiomyopathy, Dilated, 275 Cardiomyopathy, Hypertrophic, 277 Cardiomyopathy, Restrictive, 282 Carotid Sinus Syndrome, 285 Carotid Stenosis, 287 Carpal Tunnel Syndrome, 289 Cat-Scratch Disease, 290 Cavernous Sinus Thrombosis, 291 Celiac Disease, 293 Cellulitis, 296 Cervical Artery Dissection, 298 Cervical Cancer, 300 Cervical Dysplasia, 304 Cervicitis, 307 Chemotherapy-Induced Nausea and Vomiting, 308 Child Abuse and Neglect, 309 Chlamydia Genital Infections, 312 Cholangitis, 315 Cholecystitis, 316 Choledocholithiasis, 317 Cholelithiasis, 319 Chronic Fatigue Syndrome, 321 Chronic Kidney Disease, 322 Chronic Lymphocytic Leukemia (CLL), 326 Chronic Myelogenous Leukemia (CML), 329 Chronic Obstructive Pulmonary Disease, 331 Cirrhosis, 337 Cirrhotic Cardiomyopathy (CCM), 340 Claudication, 342 Clostridium difficile Infection, 347 Cluster Headache, 349 Cocaine Overdose, 351 Colorectal Cancer, 354 Complex Regional Pain Syndrome, 357 Concussion, 359 Condyloma Acuminatum, 361 Conjunctivitis, 363 Connective Tissue Disease-Associated Vasculitis, 366 Constipation, 367 Contact Dermatitis, 371 Contraception, 372 Conversion Disorder (Functional Neurologic Symptom Disorder), 375 Cor Pulmonale, 377 Coronary Artery Disease, 380 Crohn''s Disease, 389 Cryoglobulinemia, 391 Cryptococcosis, 393 Cryptogenic Organizing Pneumonia, 394 Cryptosporidium Infection, 396 Cushing''s Disease and Syndrome, 397 Cyanosis, 400 Cystic Fibrosis, 403 Cysticercosis, 406 De Quervain''s Tenosynovitis, 408 Deep Vein Thrombosis, 409 Delirium, 413 Delirium Tremens, 416 Dementia With Lewy bodies, 417 Depression, Major, 419 Dermatitis Herpetiformis, 422 Diabetes Mellitus, 424 Diabetic Foot, 434 Diabetic Ketoacidosis, 436 Diabetic Polyneuropathy, 438 Diabetic Retinopathy, 441 Diarrhea, Persistent, 443 Diffuse Idiopathic Skeletal Hyperostosis (DISH), 446 Diplopia, 448 Discoid Lupus, 451 Disseminated Intravascular Coagulation, 454 Diverticular Disease (Diverticulosis, Diverticulitis, Diverticular Hemorrhage), 457 Drug Abuse, 460 Drug-Induced Liver Injury, 463 Drug-Induced Parenchymal Lung Disease (DILD), 467 Dysfunctional Uterine Bleeding, 469 Dysmenorrhea, 471 Dyspepsia, Nonulcerative, 472 Dysphagia, 474 Early Repolarization Syndrome, 476 Echinococcosis, 479 Eclampsia, 481 Ectopic Pregnancy, 483 Ehrlichiosis and Anaplasmosis, 485 Ejaculation and Orgasm Disorders, 488 Elder Abuse, 492 Empyema, 494 Encephalitis, Acute Viral, 495 Encephalopathy, 497 Endocarditis, Infective, 499 Endometrial Cancer, 505 Endometriosis, 507 Enteropathic Arthritis, 509 Eosinophilic Esophagitis (EoE), 511 Epididymitis, 513 Epidural Abscess, 514 Epidural Hematoma, 515 Epiglottitis, 517 Epstein-Barr Virus Infection, 518 Erectile Dysfunction, 520 Erysipelas, 523 Erythema Multiforme, 524 Erythema Nodosum, 525 Esophageal Tumors, 526 Esophageal Varices, 530 Essential Tremor, 533 Factitious Disorder (Including Munchausen Syndrome), 534 Falls in the Elderly, 536 Familial Adenomatous Polyposis and Gardner''s Syndrome, 538 Fatty Liver of Pregnancy, Acute, 540 Febrile Seizures, 541 Fever in the Returning Traveler, 543 Fever of Undetermined Origin, 546 Fibrocystic Breast Disease, 548 Fibromyalgia, 549 Folliculitis, 551 Food Allergies, 552 Food Poisoning, Bacterial, 556 Frostbite, 560 Functional Gallbladder Disorder, 562 Galactorrhea, 563 Gastric Cancer, 564 Gastritis, 566 Gastroenteritis, 567 Gastroesophageal Reflux Disease (GERD), 569 Gestational Diabetes Mellitus (GDM), 572 Giant Cell Arteritis, 575 Giardiasis, 577 Gilbert''s Syndrome, 578 Glaucoma, Open-Angle, 579 Glaucoma, Primary Angle-Closure, 581 Gonorrhea, 582 Goodpasture Disease, 585 Gout, 586 Granuloma Annulare, 588 Granulomatosis With Polyangiitis, 589 Graves'' Disease, 592 Guillain-Barré Syndrome, 594 Hallucinogenic Overdose, 596 Hand-Foot-Mouth Disease, 598 Head and Neck Squamous Cell Carcinoma, 599 Heart Block, Complete, 601 Heart Block, Second-Degree, 605 Heart Failure, 609 Heat Exhaustion and Heat Stroke, 626 Heavy Menstrual Bleeding (Menorrhagia), 628 Helicobacter pylori Infection, 629 Hemochromatosis, 631 Hemophilia, 633 Hemoptysis, 635 Heparin-Induced Thrombocytopenia, 637 Hepatic Encephalopathy, 639 Hepatitis A, 642 Hepatitis B, 644 Hepatitis C, 648 Hepatocellular Carcinoma, 652 Hereditary Breast and Ovarian Cancer Syndrome, 655 Herpes Simplex, 659 Herpes Simplex Keratitis, 661 Herpes Zoster, 662 Hidradenitis Suppurativa, 664 High-Altitude Sickness, 666 Hip Fracture, 668 Hirsutism, 670 HIV-Associated Cardiomyopathy, 673 HIV-Associated Cognitive Dysfunction, 674 Hodgkin Lymphoma, 676 Hookworm, 680 Horner''s Syndrome, 681 Hot Flashes, 683 Human Immunodeficiency Virus, 684 Hydrocephalus, Normal Pressure, 696 Hydronephrosis, 698 Hypercholesterolemia, 701 Hypercoagulable State, 706 Hyperemesis Gravidarum, 709 Hyperglycemic Hyperosmolar Syndrome, 710 Hyperkalemia, 712 Hyperlipoproteinemia, Primary, 717 Hypernatremia, 720 Hyperparathyroidism, 723 Hypersensitivity Pneumonitis, 726 Hypersplenism, 728 Hypertension, 729 Hyperthyroidism, 736 Hypertrophic Osteoarthropathy, 738 Hyperuricemia, 740 Hypoactive Sexual Desire Disorder (HSDD), 742 Hypoaldosteronism, 744 Hypoglycemia, 745 Hypogonadism, Male, 747 Hypokalemic Periodic Paral.