Clinical Trials Involving Rare Diseases: H
- HELLP Syndrome (23)
- HTLV-1 Associated Myelopathy/tropical Spastic Paraparesis (9)
- Haemophilus Influenzae (193)
- Hailey-Hailey Disease (3)
- Hairy Cell Leukemia (217)
- Hansen's Disease (31)
- Hantavirus Pulmonary Syndrome (11)
- Hashimoto Encephalopathy (15)
- Heart Tumor (10)
- Heavy Metal Poisoning (42)
- Helminthiasis (253)
- Hemangioblastoma (12)
- Hemangioendothelioma (16)
- Hemangioma Thrombocytopenia Syndrome (4)
- Hemangiopericytoma (59)
- Hemicrania Continua (2)
- Hemifacial Microsomia (8)
- Hemihypertrophy (2)
- Hemiplegic Migraine (6)
- Hemochromatosis Type 3 (49)
- Hemochromatosis Type 4 (1)
- Hemoglobin C Disease (7)
- Hemoglobin SC Disease (24)
- Hemolytic Uremic Syndrome (45)
- Hemophilia (605)
- Hemophilia A (593)
- Hemophilia B (194)
- Hemophilic Arthropathy (15)
- Hemosiderosis (27)
- Henoch-Schonlein Purpura (23)
- Heparin-induced Thrombocytopenia (39)
- Hepatic Encephalopathy (145)
- Hepatic Veno-occlusive Disease (18)
- Hepatitis D (40)
- Hepatitis E (28)
- Hepatoblastoma (51)
- Hepatopulmonary Syndrome (11)
- Hepatorenal Syndrome (36)
- Hereditary Amyloidosis (7)
- Hereditary Angioedema (91)
- Hereditary Antithrombin Deficiency (11)
- Hereditary Antithrombin Deficiency Type 2 (1)
- Hereditary Ataxia (5)
- Hereditary Cerebral Hemorrhage With Amyloidosis (13)
- Hereditary Coproporphyria (10)
- Hereditary Diffuse Gastric Cancer (5)
- Hereditary Elliptocytosis (1)
- Hereditary Fructose Intolerance (9)
- Hereditary Hemorrhagic Telangiectasia (66)
- Hereditary Leiomyomatosis and Renal Cell Cancer (4)
- Hereditary Methemoglobinemia (1)
- Hereditary Motor and Sensory Neuropathy (337)
- Hereditary Multiple Osteochondromas (5)
- Hereditary Neuropathy With Liability to Pressure Palsies (337)
- Hereditary Pancreatitis (8)
- Hereditary Paraganglioma-pheochromocytoma (1)
- Hereditary Sensory Neuropathy Type 1 (1)
- Hereditary Sensory and Autonomic Neuropathy (15)
- Hereditary Spastic Paraplegia (15)
- Hereditary Spherocytosis (4)
- Hermansky-Pudlak Syndrome (9)
- Herpes Simiae (B Virus) (364)
- Herpes Simplex Encephalitis (2)
- Herpes Zoster Ophthalmicus (2)
- Herpes Zoster Oticus (1)
- Heterotaxy (6)
- Hidradenocarcinoma (1)
- Hirschsprung's Disease (30)
- His Bundle Tachycardia (1)
- Hodgkin Lymphoma (1,255)
- Holoprosencephaly (4)
- Homocystinuria (9)
- Homocystinuria Due to CBS Deficiency (2)
- Homologous Wasting Disease (771)
- Horizontal Gaze Palsy With Progressive Scoliosis (1)
- Horner's Syndrome (5)
- Hoyeraal Hreidarsson Syndrome (1)
- Human T-cell Leukemia Virus Type 1 (47)
- Human T-cell Leukemia Virus Type 2 (6)
- Huntington Disease (176)
- Hurler Syndrome (52)
- 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 (179)
- Hypereosinophilic Syndrome (109)
- 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 (7)
- Hypoganglionosis (1)
- Hypohidrotic Ectodermal Dysplasia (17)
- Hypokalemic Periodic Paralysis (3)
- Hypolipoproteinemia (24)
- Hypoparathyroidism (93)
- Hypopharyngeal Cancer (352)
- Hypophosphatasia (29)
- Hypophosphatemic Rickets (42)
- Hypopituitarism (156)
- Hypoplastic Left Heart Syndrome (54)
- Hypoplastic Right Heart Syndrome (3)
- Hypothalamic Obesity (11)
- Hypotrichosis Simplex (1)
- Hypoxanthine Guanine Phosphoribosyltransferase Deficiency (4)