- Haemophilus Infections - 25 Studies
- Haemophilus Influenzae - 25 Studies
- Hailey-Hailey Disease - 2 Studies
- Hair Diseases - 25 Studies
- Hairy Cell Leukemia - 25 Studies
- Halitosis - 26 Studies
- Hallucinations - 25 Studies
- Hallux Limitus - 16 Studies
- Hallux Rigidus - 18 Studies
- Hallux Valgus - 25 Studies
- Hamartoma - 25 Studies
- Hamartoma Syndrome, Multiple - 17 Studies
- Hammer Toe Syndrome - 5 Studies
- Hand Deformities - 6 Studies
- Hand Deformities, Congenital - 4 Studies
- Hand Dermatoses - 6 Studies
- Hand Injuries - 26 Studies
- Hand, Foot and Mouth Disease - 25 Studies
- Hand-Foot Syndrome - 26 Studies
- Hansen's Disease - 22 Studies
- Hantavirus Infections - 9 Studies
- Hantavirus Pulmonary Syndrome - 9 Studies
- Hashimoto Disease - 26 Studies
- Hashimoto's Encephalitis - 6 Studies
- Head Injuries, Closed - 25 Studies
- Head Injuries, Penetrating - 2 Studies
- Headache Disorders - 26 Studies
- Headache Disorders, Primary - 25 Studies
- Headache Disorders, Secondary - 25 Studies
- Hearing Disorders - 25 Studies
- Hearing Loss - 41 Studies
- Hearing Loss, Bilateral - 17 Studies
- Hearing Loss, Central - 2 Studies
- Hearing Loss, Conductive - 26 Studies
- Hearing Loss, High-Frequency - 3 Studies
- Hearing Loss, Mixed Conductive-Sensorineural - 13 Studies
- Hearing Loss, Noise-Induced - 16 Studies
- Hearing Loss, Sensorineural - 28 Studies
- Hearing Loss, Sudden - 11 Studies
- Hearing Loss, Unilateral - 18 Studies
- Heart Arrest - 25 Studies
- Heart Block - 25 Studies
- Heart Defects, Congenital - 28 Studies
- Heart Failure, Diastolic - 28 Studies
- Heart Failure, Systolic - 28 Studies
- Heart Injuries - 7 Studies
- Heart Murmurs - 11 Studies
- Heart Neoplasms - 9 Studies
- Heart Septal Defects - 25 Studies
- Heart Septal Defects, Atrial - 25 Studies
- Heart Septal Defects, Ventricular - 25 Studies
- Heart Tumor - 9 Studies
- Heartburn - 24 Studies
- Heat Stress Disorders - 17 Studies
- Heat Stroke - 8 Studies
- Heavy Metal Poisoning - 14 Studies
- Heel Spur - 8 Studies
- Helicobacter Infections - 25 Studies
- HELLP Syndrome - 14 Studies
- Helminthiasis - 25 Studies
- Hemangioblastoma - 11 Studies
- Hemangioendothelioma - 9 Studies
- Hemangioendothelioma, Epithelioid - 4 Studies
- Hemangioma - 25 Studies
- Hemangioma Thrombocytopenia Syndrome - 4 Studies
- Hemangioma, Capillary - 25 Studies
- Hemangioma, Cavernous - 7 Studies
- Hemangioma, Cavernous, Central Nervous System - 4 Studies
- Hemangiopericytoma - 25 Studies
- Hemangiosarcoma - 25 Studies
- Hemarthrosis - 13 Studies
- Hematemesis - 9 Studies
- Hematologic Neoplasms - 25 Studies
- Hematoma - 25 Studies
- Hematoma, Epidural, Cranial - 6 Studies
- Hematoma, Epidural, Spinal - 6 Studies
- Hematoma, Subdural - 25 Studies
- Hematoma, Subdural, Acute - 2 Studies
- Hematoma, Subdural, Chronic - 20 Studies
- Hematoma, Subdural, Intracranial - 2 Studies
- Hematuria - 26 Studies
- Hemianopsia - 14 Studies
- Hemifacial Microsomia - 5 Studies
- Hemifacial Spasm - 13 Studies
- Hemihypertrophy - 2 Studies
- Hemiplegia - 27 Studies
- Hemiplegic Migraine - 6 Studies
- Hemochromatosis - 25 Studies
- Hemoglobin C Disease - 6 Studies
- Hemoglobin SC Disease - 19 Studies
- Hemoglobinopathies - 24 Studies
- Hemoglobinuria - 24 Studies
- Hemoglobinuria, Paroxysmal - 24 Studies
- Hemolysis - 26 Studies
- Hemolytic-Uremic Syndrome - 25 Studies
- Hemoperitoneum - 3 Studies
- Hemophagocytic Lymphohistiocytosis - 25 Studies
- Hemophilia - 32 Studies
- Hemophilia A - 37 Studies
- Hemophilia B - 28 Studies
- Hemophilic Arthropathy - 12 Studies
- Hemopneumothorax - 3 Studies
- Hemoptysis - 13 Studies
- Hemorrhagic Fever - 25 Studies
- Hemorrhagic Fever with Renal Syndrome - 7 Studies
- Hemorrhagic Fever, Crimean - 3 Studies
- Hemorrhagic Fever, Ebola - 25 Studies
- Hemorrhagic Fevers, Viral - 25 Studies
- Hemorrhoids - 25 Studies
- Hemosiderosis - 25 Studies
- Hemothorax - 11 Studies
- Henoch-Schonlein Purpura - 19 Studies
- Heparin-induced Thrombocytopenia - 25 Studies
- Hepatic Encephalopathy - 27 Studies
- Hepatic Insufficiency - 27 Studies
- Hepatic Veno-Occlusive Disease - 12 Studies
- Hepatitis B, Chronic - 26 Studies
- Hepatitis D - 26 Studies
- Hepatitis D, Chronic - 20 Studies
- Hepatitis E - 21 Studies
- Hepatitis, Alcoholic - 25 Studies
- Hepatitis, Autoimmune - 25 Studies
- Hepatoblastoma - 25 Studies
- Hepatolenticular Degeneration - 16 Studies
- Hepatomegaly - 5 Studies
- Hepatopulmonary Syndrome - 8 Studies
- Hepatorenal Syndrome - 27 Studies
- Hereditary Amyloidosis - 6 Studies
- Hereditary Angioedema - 26 Studies
- Hereditary Angioedema Types I and II - 7 Studies
- Hereditary Antithrombin Deficiency - 10 Studies
- Hereditary Ataxia - 5 Studies
- Hereditary Autoinflammatory Diseases - 25 Studies
- Hereditary Breast and Ovarian Cancer Syndrome - 25 Studies
- Hereditary Central Nervous System Demyelinating Diseases - 25 Studies
- Hereditary Cerebral Hemorrhage With Amyloidosis - 7 Studies
- Hereditary Coproporphyria - 5 Studies
- Hereditary Fructose Intolerance - 6 Studies
- Hereditary Hemorrhagic Telangiectasia - 26 Studies
- Hereditary Hyperekplexia - 5 Studies
- Hereditary Leiomyomatosis and Renal Cell Cancer - 3 Studies
- Hereditary Motor and Sensory Neuropathy - 25 Studies
- Hereditary Multiple Osteochondromas - 3 Studies
- Hereditary Neuropathy With Liability to Pressure Palsy - 25 Studies
- Hereditary Pancreatitis - 7 Studies
- Hereditary Sensory and Autonomic Neuropathies - 12 Studies
- Hereditary Sensory and Motor Neuropathy - 25 Studies
- Hereditary Spastic Paraplegia - 8 Studies
- Hereditary Spherocytosis - 4 Studies
- Heredodegenerative Disorders, Nervous System - 25 Studies
- Hermanski-Pudlak Syndrome - 6 Studies
- Hermansky-Pudlak Syndrome - 7 Studies
- Hernia - 29 Studies
- Hernia, Abdominal - 25 Studies
- Hernia, Diaphragmatic - 25 Studies
- Hernia, Femoral - 5 Studies
- Hernia, Hiatal - 25 Studies
- Hernia, Inguinal - 28 Studies
- Hernia, Umbilical - 25 Studies
- Hernia, Ventral - 27 Studies
- Hernias, Diaphragmatic, Congenital - 25 Studies
- Heroin Dependence - 25 Studies
- Herpangina - 2 Studies
- Herpes Genitalis - 25 Studies
- Herpes Labialis - 25 Studies
- Herpes Simplex - 25 Studies
- Herpes Simplex Encephalitis - 2 Studies
- Herpes Zoster - 31 Studies
- Herpes Zoster Ophthalmicus - 2 Studies
- Heterotaxy - 7 Studies
- Heterotaxy Syndrome - 7 Studies
- Hiccup - 3 Studies
- Hidradenitis - 25 Studies
- Hidradenitis Suppurativa - 39 Studies
- Hip Dislocation - 25 Studies
- Hip Dislocation, Congenital - 25 Studies
- Hip Fractures - 28 Studies
- Hip Injuries - 25 Studies
- Hirschsprung Disease - 19 Studies
- Hirsutism - 25 Studies
- Histiocytic Necrotizing Lymphadenitis - 2 Studies
- Histiocytic Sarcoma - 2 Studies
- Histiocytoma - 25 Studies
- Histiocytoma, Benign Fibrous - 25 Studies
- Histiocytoma, Malignant Fibrous - 25 Studies
- Histiocytosis - 25 Studies
- Histiocytosis, Langerhans-Cell - 25 Studies
- Histiocytosis, Non-Langerhans-Cell - 25 Studies
- Histiocytosis, Sinus - 2 Studies
- Histoplasmosis - 24 Studies
- HIV Enteropathy - 4 Studies
- HIV Seropositivity - 27 Studies
- HIV Wasting Syndrome - 14 Studies
- HIV-Associated Lipodystrophy Syndrome - 23 Studies
- Hoarding Disorder - 13 Studies
- Hoarseness - 25 Studies
- Hodgkin Lymphoma, Childhood - 25 Studies
- Holoprosencephaly - 4 Studies
- Homocystinuria - 6 Studies
- Homologous Wasting Disease - 25 Studies
- Hookworm Infections - 25 Studies
- Hordeolum - 2 Studies
- Horner Syndrome - 3 Studies
- Hot Flashes - 32 Studies
- Hoyeraal Hreidarsson Syndrome - 14 Studies
- HTLV-1 Associated Myelopathy/tropical Spastic Paraparesis - 9 Studies
- HTLV-I Infections - 25 Studies
- HTLV-II Infections - 2 Studies
- Human T-cell Leukemia Virus Type 1 - 25 Studies
- Human T-cell Leukemia Virus Type 2 - 5 Studies
- Humeral Fractures - 25 Studies
- Huntington Disease - 31 Studies
- Hurler Syndrome - 25 Studies
- Hurler–Scheie Syndrome - 15 Studies
- Hurthle Cell Thyroid Cancer - 6 Studies
- Hutchinson's Melanotic Freckle - 14 Studies
- Hyaline Membrane Disease - 25 Studies
- Hydatidiform Mole - 12 Studies
- Hydatidiform Mole, Invasive - 2 Studies
- Hydatidosis - 7 Studies
- Hydrarthrosis - 3 Studies
- Hydrocephalus - 28 Studies
- Hydrocephalus, Normal Pressure - 25 Studies
- Hydronephrosis - 25 Studies
- Hydrophthalmos - 10 Studies
- Hydrops Fetalis - 4 Studies
- Hydrothorax - 8 Studies
- Hyper IgE Syndrome - 14 Studies
- Hyper-IgD Syndrome - 2 Studies
- Hyper-IgM Immunodeficiency Syndrome - 14 Studies
- Hyper-IgM Immunodeficiency Syndrome, Type 1 - 13 Studies
- Hyperacusis - 11 Studies
- Hyperadrenalism - 25 Studies
- Hyperaldosteronism - 25 Studies
- Hyperalgesia - 26 Studies
- Hyperammonemia - 17 Studies
- Hyperandrogenism - 25 Studies
- Hyperargininemia - 2 Studies
- Hyperbilirubinemia - 25 Studies
- Hyperbilirubinemia, Neonatal - 25 Studies
- Hypercalcemia - 25 Studies
- Hypercalciuria - 23 Studies
- Hypercapnia - 26 Studies
- Hypercholesterolemia - 30 Studies
- Hyperemesis Gravidarum - 17 Studies
- Hyperemia - 25 Studies
- Hypereosinophilic Syndrome - 25 Studies
- Hyperglycemia - 27 Studies
- Hyperhidrosis - 25 Studies
- Hyperhomocysteinemia - 24 Studies
- Hyperkalemia - 27 Studies
- Hyperkalemic Periodic Paralysis - 2 Studies
- Hyperkeratosis, Epidermolytic - 2 Studies
- Hyperkinesis - 25 Studies
- Hyperlactatemia - 16 Studies
- Hyperlipidemia Type 3 - 3 Studies
- Hyperlipidemia, Familial Combined - 25 Studies
- Hyperlipoproteinemia Type 2 - 25 Studies
- Hyperlipoproteinemia Type 5 - 13 Studies
- Hyperlipoproteinemia Type I - 13 Studies
- Hyperlipoproteinemia Type II - 25 Studies
- Hyperlipoproteinemia Type III - 4 Studies
- Hyperlipoproteinemia Type IV - 6 Studies
- Hyperlipoproteinemia Type V - 13 Studies
- Hyperlipoproteinemias - 25 Studies
- Hypernatremia - 25 Studies
- Hyperopia - 25 Studies
- Hyperostosis - 14 Studies
- Hyperoxaluria - 26 Studies
- Hyperoxaluria, Primary - 21 Studies
- Hyperoxia - 25 Studies
- Hyperparathyroidism - 25 Studies
- Hyperparathyroidism, Primary - 25 Studies
- Hyperparathyroidism, Secondary - 25 Studies
- Hyperphagia - 25 Studies
- Hyperphosphatemia - 25 Studies
- Hyperpigmentation - 26 Studies
- Hyperplasia - 24 Studies
- Hyperprolactinemia - 1 Studies
- Hypersensitivity Pneumonitis - 10 Studies
- Hypersensitivity Vasculitis - 2 Studies
- Hypersensitivity, Delayed - 25 Studies
- Hypersomnolence, Idiopathic - 5 Studies
- Hypersplenism - 6 Studies
- Hypertelorism - 12 Studies
- Hypertension, Portal - 25 Studies
- Hypertension, Pregnancy-Induced - 26 Studies
- Hypertension, Pulmonary - 26 Studies
- Hypertension, Renal - 23 Studies
- Hypertension, Renovascular - 14 Studies
- Hypertensive Encephalopathy - 3 Studies
- Hypertensive Retinopathy - 2 Studies
- Hyperthyroidism - 25 Studies
- Hypertrichosis - 10 Studies
- Hypertriglyceridemia - 27 Studies
- Hypertriglyceridemic Waist - 4 Studies
- Hypertrophy - 25 Studies
- Hypertrophy, Left Ventricular - 25 Studies
- Hypertrophy, Right Ventricular - 4 Studies
- Hyperuricemia - 23 Studies
- Hyperventilation - 25 Studies
- Hypervitaminosis A - 2 Studies
- Hypesthesia - 25 Studies
- Hypoadrenalism - 25 Studies
- Hypoalbuminemia - 19 Studies
- Hypoaldosteronism - 4 Studies
- Hypoalphalipoproteinemias - 11 Studies
- Hypobetalipoproteinemias - 8 Studies
- Hypocalcemia - 26 Studies
- Hypocapnia - 6 Studies
- Hypochondriasis - 12 Studies
- Hypochondroplasia - 3 Studies
- Hypocomplementemic Urticarial Vasculitis - 5 Studies
- Hypoglycemia - 27 Studies
- Hypogonadism - 25 Studies
- Hypohidrosis - 3 Studies
- Hypohidrotic Ectodermal Dysplasia - 17 Studies
- Hypokalemia - 23 Studies
- Hypokalemic Periodic Paralysis - 3 Studies
- Hypokinesia - 23 Studies
- Hypolipoproteinemias - 19 Studies
- Hypomelanotic Disorder - 25 Studies
- Hyponatremia - 25 Studies
- Hypoparathyroidism - 25 Studies
- Hypopharyngeal Cancer - 25 Studies
- Hypopharyngeal Neoplasms - 25 Studies
- Hypophosphatasia - 26 Studies
- Hypophosphatemia - 25 Studies
- Hypophosphatemia, Familial - 22 Studies
- Hypophosphatemic Rickets - 1 Studies
- Hypopigmentation - 25 Studies
- Hypopituitarism - 25 Studies
- Hypoplastic Left Heart Syndrome - 26 Studies
- Hypoplastic Right Heart Syndrome - 2 Studies
- Hypoproteinemia - 15 Studies
- Hypospadias - 26 Studies
- Hypotension - 26 Studies
- Hypotension, Orthostatic - 25 Studies
- Hypothalamic Diseases - 25 Studies
- Hypothalamic Dysfunction - 3 Studies
- Hypothalamic Neoplasms - 25 Studies
- Hypothermia - 26 Studies
- Hypothyroidism - 27 Studies
- Hypotrichosis - 26 Studies
- Hypoventilation - 26 Studies
- Hypovolemia - 26 Studies
- Hypoxia, Brain - 25 Studies
- Hypoxia-Ischemia, Brain - 26 Studies
- Hysteria - 25 Studies