Clinical Trials Involving Rare Diseases: H
- HELLP Syndrome (22)
- HTLV-1 Associated Myelopathy/tropical Spastic Paraparesis (9)
- Haemophilus Influenzae (192)
- Hailey-Hailey Disease (3)
- Hairy Cell Leukemia (217)
- Hansen's Disease (31)
- Hantavirus Pulmonary Syndrome (11)
- Hashimoto Encephalopathy (14)
- Heart Tumor (10)
- Heavy Metal Poisoning (41)
- Helminthiasis (248)
- Hemangioblastoma (12)
- Hemangioendothelioma (16)
- Hemangioma Thrombocytopenia Syndrome (4)
- Hemangiopericytoma (59)
- Hemicrania Continua (2)
- Hemifacial Microsomia (9)
- Hemihypertrophy (2)
- Hemiplegia (203)
- Hemiplegic Migraine (6)
- Hemochromatosis Type 3 (48)
- Hemochromatosis Type 4 (1)
- Hemoglobin C Disease (7)
- Hemoglobin SC Disease (24)
- Hemoglobinemia (1)
- Hemolytic Uremic Syndrome (45)
- Hemophilia (595)
- Hemophilia A (583)
- Hemophilia B (194)
- Hemophilic Arthropathy (15)
- Hemosiderosis (27)
- Henoch-Schonlein Purpura (23)
- Heparin-induced Thrombocytopenia (39)
- Hepatic Encephalopathy (142)
- Hepatic Veno-occlusive Disease (16)
- Hepatitis D (38)
- Hepatitis E (28)
- Hepatoblastoma (50)
- Hepatopulmonary Syndrome (11)
- Hepatorenal Syndrome (36)
- Hereditary Amyloidosis (6)
- Hereditary Angioedema (88)
- Hereditary Antithrombin Deficiency (11)
- Hereditary Antithrombin Deficiency Type 2 (1)
- Hereditary Ataxia (5)
- Hereditary Cerebral Hemorrhage With Amyloidosis (12)
- Hereditary Coproporphyria (10)
- Hereditary Diffuse Gastric Cancer (3)
- Hereditary Elliptocytosis (1)
- Hereditary Fructose Intolerance (9)
- Hereditary Hemorrhagic Telangiectasia (63)
- Hereditary Leiomyomatosis and Renal Cell Cancer (4)
- Hereditary Methemoglobinemia (1)
- Hereditary Motor and Sensory Neuropathy (330)
- Hereditary Multiple Osteochondromas (5)
- Hereditary Neuropathy With Liability to Pressure Palsies (330)
- Hereditary Pancreatitis (8)
- Hereditary Paraganglioma-pheochromocytoma (1)
- Hereditary Sensory Neuropathy Type 1 (1)
- Hereditary Sensory and Autonomic Neuropathy (15)
- Hereditary Spastic Paraplegia (14)
- Hereditary Spherocytosis (4)
- Hermansky-Pudlak Syndrome (8)
- Herpes Simplex Encephalitis (2)
- Herpes Zoster Ophthalmicus (2)
- Herpes Zoster Oticus (1)
- Heterotaxy (6)
- Hidradenocarcinoma (1)
- Hirschsprung's Disease (27)
- His Bundle Tachycardia (1)
- Hodgkin Lymphoma (1,250)
- Holoprosencephaly (4)
- Homocystinuria (9)
- Homocystinuria Due to CBS Deficiency (2)
- Homologous Wasting Disease (758)
- Horizontal Gaze Palsy With Progressive Scoliosis (1)
- Horner's Syndrome (5)
- Hoyeraal Hreidarsson Syndrome (1)
- Human T-cell Leukemia Virus Type 1 (48)
- Human T-cell Leukemia Virus Type 2 (6)
- Huntington Disease (172)
- Hurler Syndrome (39)
- Hurler–Scheie Syndrome (16)
- Hurthle Cell Thyroid Cancer (6)
- Hyaline Fibromatosis Syndrome (1)
- Hydatidiform Mole (12)
- Hydatidosis (10)
- Hydrops Fetalis (7)
- Hyper IgE Syndrome (12)
- Hyper-IgD Syndrome (3)
- Hyperacusis (14)
- Hyperadrenalism (173)
- Hypereosinophilic Syndrome (102)
- Hyperinsulinism-hyperammonemia Syndrome (1)
- Hyperkalemic Periodic Paralysis (2)
- Hyperlipidemia Type 3 (4)
- Hyperlipoproteinemia Type 4 (1)
- Hyperlipoproteinemia Type 5 (9)
- Hypermobile Ehlers-Danlos Syndrome (1)
- Hyperprolinemia (1)
- Hypersensitivity Pneumonitis (14)
- Hypersensitivity Vasculitis (2)
- Hypoadrenalism (153)
- Hypoaldosteronism (7)
- Hypochondroplasia (3)
- Hypocomplementemic Urticarial Vasculitis (6)
- Hypohidrotic Ectodermal Dysplasia (17)
- Hypokalemic Periodic Paralysis (3)
- Hypolipoproteinemia (24)
- Hypoparathyroidism (91)
- Hypopharyngeal Cancer (350)
- Hypophosphatasia (25)
- Hypophosphatemic Rickets (39)
- Hypopituitarism (156)
- Hypoplastic Left Heart Syndrome (53)
- Hypoplastic Right Heart Syndrome (3)
- Hypothalamic Obesity (11)
- Hypotrichosis Simplex (1)
- Hypoxanthine Guanine Phosphoribosyltransferase Deficiency (4)