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All Communities

  • Dandy-Walker Syndrome

    10 members

    Dandy-Walker Syndrome is a rare congenital brain malformation.

  • Danon Disease

    3 members

    What is Danon Disease?

    Danon Disease (DD) is a rare, genetically inherited disease that primarily affects the heart, but can involve other organ sy...

  • Darier's Disease

    54 members

    Darier disease, also known as keratosis follicularis, is a rare genetic disorder of the skin. It is characterized by skin lesions that consist of thickened, scaly bumps which can be yellow or br...

  • Degos Disease

    3 members

    Degos Disease is a rare disorder that affects the lining of the veins and arteries.



  • Delta-Sarcoglycanopathy

    1 members

  • Dent's Disease

    76 members

    Dent disease is a rare X-linked recessive, chronic kidney condition found almost exclusively in males. The severity of the disease and the specific symptoms can vary. Females, who can be carrier...

  • Dentatorubral Pallidoluysian Atrophy

    4 members

    Dentatorubral Pallidoluysian Atrophy is a rare disorder characterized by spinocerebellar degeneration.

  • Dermatitis Herpetiformis

    4 members

    Dermatitis Herpetiformis is a rare chronic blistering skin condition.

  • Dermatofibrosarcoma Protuberans

    6 members

    Dermatofibrosarcoma Protuberans is a rare type of malignant tumor.

  • Dermatomyositis

    47 members

    Dermatomyositis (DM) is a rare autoimmune connective tissue disorder related to polymyositis. An inflammatory myopathy disease; myopathy is a condition that affects the muscles.  It is char...

  • Desmin Related Myopathy

    5 members

    Desmin Related Myopathy is a disorder characterized by mutation in the gene for desmin which prevents it from forming protein filaments.

  • Diabetes mellitus type 1

    10 members

    Diabetes mellitus type 1 is an autoimmune disease characterized by the permanent destruction of insulin-producing beta cells of the pancreas.

  • Diamond Blackfan Anemia

    3 members

    Diamond Blackfan Anemia is a rare blood condition where bone marrow produces little or no red blood cells.

  • Diastrophic Dwarfism

    2 members

    Diastrophic Dysplasia is a congenial disorder which affects cartilage and bone development.

  • Diffuse Ideopathic Skeletal Hyperostosis

    5 members

    Diffuse ideopathic skeletal hyperostosis is a form of degenerative arthritis characterized by excessive bone growth along the sides of the vertebrae of the spine.

  • Diffuse Palmoplantar Keratoderma

    5 members

    Diffuse Palmoplantar Keratoderma is characterized by an even, thick, symmetric hyperkeratosis over the whole of the palm and sole.

  • Diploid Triploid Mosaicism

    7 members

    Diploid Triploid Mosaicism is a rare chromosomal disorder in which additional chromosomes are found in a portion of cells.

  • Distal Myopathy

    3 members

    Distal Myopathy is a group of rare, slowly progressive, muscle disorders that primarily affect muscles in the lower arms, hands, lower legs and feet.

  • Distal Trisomy 10q


    Distal Trisomy 10q is a rare disorder caused by an extra portion of the long arm on chromosome 10.

  • Donohue Syndrome

    1 members

    Donohue Syndrome is a rare genetic disorder caused by an impaired insulin receptor.

  • Dopa-Responsive Dystonia

    5 members

    Dopamine-Responsive Dystonia is a genetic movement disorder.

  • Double Cortex Syndrome

    40 members

    Double Cortex Syndrome is a rare brain disorder that can cause mental retardation, learning disabilities, cognative disabilities and epilepsy due to an extra layer of nerves developed under the ...

  • Down Syndrome

    8 members

    Down syndrome is a disorder originating from an additional 21st chromosome.

  • Dravet Syndrome

    17 members

    Dravet Syndrome is a rare epileptic encephalopathy classified in 1989 by the International League Against Epilepsy (ILAE) as a "syndrome undetermined as to whether seizures are focal or generalized...

  • Duane Syndrome

    4 members

    Duane Syndrome is a rare eye movement disorder.

  • Duodenal Cancer

    1 members

    Duodenal Cancer is a rare cancer in the beginning section of the small intestine located between the stomach and the jejunum.

  • Dupuytren's Contracture

    3 members

    Dupuytren's Contracture is a rare condition in which the fingers bend towards the palm and cannot be fully straightened.

  • Dyskeratosis Congenita

    3 members

    Dyskeratosis congenita is a rare congenital disorder resulting in premature aging.