Clinical Trials Involving Rare Diseases: H
- HELLP Syndrome (27)
- HIVEP2-related Intellectual Disability (1)
- HTLV-1 Associated Myelopathy/tropical Spastic Paraparesis (25)
- Haemophilus Influenzae (203)
- Hailey-Hailey Disease (4)
- Hairy Cell Leukemia (225)
- Hansen's Disease (37)
- Hantavirus Pulmonary Syndrome (15)
- Hashimoto Encephalopathy (31)
- Heart Tumor (10)
- Heavy Metal Poisoning (45)
- Helminthiasis (304)
- Hemangioblastoma (15)
- Hemangioendothelioma (26)
- Hemangioma Thrombocytopenia Syndrome (9)
- Hemangiopericytoma (74)
- Hemicrania Continua (3)
- Hemifacial Microsomia (6)
- Hemihypertrophy (2)
- Hemimegalencephaly (2)
- Hemochromatosis Type 3 (79)
- Hemochromatosis Type 4 (1)
- Hemoglobin C Disease (7)
- Hemoglobin SC Disease (32)
- Hemolytic Uremic Syndrome (52)
- Hemophilia (754)
- Hemophilia A (727)
- Hemophilia B (222)
- Hemophilic Arthropathy (30)
- Hemosiderosis (79)
- Henoch-Schonlein Purpura (32)
- Heparin-induced Thrombocytopenia (44)
- Hepatic Encephalopathy (184)
- Hepatic Veno-occlusive Disease (21)
- Hepatitis D (57)
- Hepatitis E (31)
- Hepatoblastoma (68)
- Hepatopulmonary Syndrome (14)
- Hepatorenal Syndrome (48)
- Hereditary Amyloidosis (10)
- Hereditary Angioedema (133)
- Hereditary Antithrombin Deficiency (14)
- Hereditary Antithrombin Deficiency Type 2 (1)
- Hereditary Ataxia (9)
- Hereditary Cerebral Hemorrhage With Amyloidosis (22)
- Hereditary Coproporphyria (14)
- Hereditary Diffuse Gastric Cancer (8)
- Hereditary Diffuse Leukoencephalopathy With Spheroids (4)
- Hereditary Elliptocytosis (1)
- Hereditary Fructose Intolerance (11)
- Hereditary Hemorrhagic Telangiectasia (77)
- Hereditary Leiomyomatosis and Renal Cell Cancer (9)
- Hereditary Melanoma (2)
- Hereditary Methemoglobinemia (1)
- Hereditary Motor and Sensory Neuropathy (518)
- Hereditary Multiple Osteochondromas (5)
- Hereditary Neuropathy With Liability to Pressure Palsies (518)
- Hereditary Pancreatitis (9)
- Hereditary Paraganglioma-pheochromocytoma (1)
- Hereditary Renal Cell Carcinoma (2)
- Hereditary Sensory Neuropathy Type 1 (1)
- Hereditary Sensory and Autonomic Neuropathy (15)
- Hereditary Spastic Paraplegia (26)
- Hereditary Spherocytosis (5)
- Hermansky-Pudlak Syndrome (10)
- Herpes Simiae (B Virus) (437)
- Herpes Simplex Encephalitis (4)
- Herpes Zoster Ophthalmicus (2)
- Herpes Zoster Oticus (2)
- Heterotaxy (6)
- Hidradenocarcinoma (1)
- Hirschsprung Disease (50)
- His Bundle Tachycardia (1)
- Hodgkin Lymphoma (1,372)
- Holoprosencephaly (5)
- Homocysteinemia (4)
- Homocystinuria (12)
- Homocystinuria Due to CBS Deficiency (4)
- Homologous Wasting Disease (911)
- Horizontal Gaze Palsy With Progressive Scoliosis (2)
- Horner's Syndrome (6)
- Hoyeraal Hreidarsson Syndrome (1)
- Human HOXA1 Syndromes (1)
- Human T-cell Leukemia Virus Type 1 (54)
- Human T-cell Leukemia Virus Type 2 (6)
- Huntington Disease (225)
- Hurler Syndrome (58)
- Hurler–Scheie Syndrome (18)
- Hurthle Cell Thyroid Cancer (7)
- Hyaline Fibromatosis Syndrome (1)
- Hydatidiform Mole (15)
- Hydatidosis (21)
- Hydroa Vacciniforme (1)
- Hydrops Fetalis (9)
- Hyper IgE Syndrome (13)
- Hyper-IgD Syndrome (3)
- Hyperacusis (17)
- Hyperadrenalism (240)
- Hypereosinophilic Syndrome (147)
- Hyperinsulinism-hyperammonemia Syndrome (2)
- Hyperkalemic Periodic Paralysis (2)
- Hyperlipidemia Type 3 (6)
- Hyperlipoproteinemia Type 4 (1)
- Hyperlipoproteinemia Type 5 (12)
- Hypermobile Ehlers-Danlos Syndrome (12)
- Hyperprolinemia (1)
- Hypersensitivity Pneumonitis (28)
- Hypersensitivity Vasculitis (2)
- Hypertrophic Olivary Degeneration (1)
- Hypoaldosteronism (9)
- Hypochondroplasia (5)
- Hypocomplementemic Urticarial Vasculitis (7)
- Hypoganglionosis (3)
- Hypohidrotic Ectodermal Dysplasia (20)
- Hypokalemic Periodic Paralysis (3)
- Hypolipoproteinemia (26)
- Hypomelanotic Disorder (220)
- Hypoparathyroidism (127)
- Hypopharyngeal Cancer (377)
- Hypophosphatasia (33)
- Hypophosphatemic Rickets (57)
- Hypopituitarism (181)
- Hypoplastic Left Heart Syndrome (61)
- Hypoplastic Right Heart Syndrome (3)
- Hypothalamic Obesity (14)
- Hypotrichosis Simplex (1)
- Hypoxanthine Guanine Phosphoribosyltransferase Deficiency (4)