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The Rare Disease Search Engine is specialized search engine using Google's co-op program combined with a narrowed field of search to eliminate useless results that would normally complicate one's search for needed information.

To Search: simply begin typing in the name of the condition you wish to find. Results matching the partial name will be returned. The results will search through the name, abbreviation and alternate names of all conditions we have in our database. The results that are returned will be links to search results of a narrowed, filtered web search of only those sites that offer reliable, focused information on rare diseases. Hovering over the condition name will display a ist of alternate names on file.

Find diseases that begin with: ABCDEFGHIJKLMNOPQRSTUVWXYZ

Hageman Factor Deficiency Haim-Munk SyndromeHairy Cell Leukemia Hairy Tongue Hajdu Cheney Syndrome Hallermann Streiff syndrome Hand-Foot-Mouth Syndrome Hanhart Syndrome Hantavirus Pulmonary Syndrome Harlequin Type Ichthyosis Hartnup Disease Hay-Wells Syndrome Heavy Metal Poisoning Hemangioma Thrombocytopenia Syndrome Hemimegalencephaly Hemolytic Anemia Hemolytic Uremic Syndrome Hemophilia Henoch-Schonlein Purpura Hepatic PorphyriaHepatitis B Hepatitis C Hepatorenal Syndrome Hereditary Angioedema Hereditary Ataxia Hereditary CoproporphyriaHereditary Fructose Intolerance Hereditary Hemochromatosis Hereditary Hemorrhagic Telangiectasia Hereditary Hyperphosphatasia Hereditary Lymphedema Hereditary Nonspherocytic Hemolytic Anemia Hereditary Olivopontocerebellar Atrophy Hereditary Sensory Neuropathy Hereditary Sensory Neuropathy Hereditary Sensory Neuropathy Hereditary Spastic Paraplegia Hereditary Spherocytic Hemolytic Anemia Hereditary Tyrosinemia Hermansky Pudlak Syndrome Herpes Simplex Encephalitis Hers Disease Heterozygous OSMED Hidradenitis Suppurativa Hirschsprung's Disease Histidinemia Hodgkin's Disease Holoprosencephaly Holt Oram Syndrome Homocystinuria Homozygous OSMED Horner's Syndrome Human Granulocytic EhrlichiosisHuman HOXA1 Syndromes Human Monocytic EhrlichiosisHunter Syndrome Huntington's Disease Hutchinson Gilford Progeria Hydranencephaly Hydrocephalus Hyper IgD Syndrome Hyper IgM Syndrome Hyperemesis Gravidarum Hyperexplexia Hyperkalemia Hyperlipoproteinemia Type III Hyperlipoproteinemia Type IV Hyperostosis Frontalis Interna HyperoxaluriaHyperprolinemia Type I Hyperprolinemia Type II Hypertensive Retinopathy Hyperthermia Hypochondroplasia Hypoglycemia Hypohidrotic Ectodermal Dysplasia Hypokalemia Hypomelanosis of ItoHypoparathyroidism Hypophosphatasia Hypoplastic Left Heart Syndrome Hypothyroidism