Atrophic lichen planus

All ages

Atrophic papulosis

Adult

Atrophoderma of Pasini and Pierini

Adult

Atrophoderma vermiculata

Autosomal recessive, Unknown

Childhood

Attenuated Chédiak-Higashi syndrome

Autosomal recessive

Childhood

Attenuated familial adenomatous polyposis

Autosomal dominant, Autosomal recessive

Adult

Atypical Fanconi syndrome-neonatal hyperinsulinism syndrome

Autosomal dominant

Neonatal

Atypical Rett syndrome

Autosomal dominant, X-linked dominant

Neonatal

Atypical Werner syndrome

Autosomal dominant, Unknown

Adolescent, Adult

Atypical chronic myeloid leukemia

Not applicable

Adult

Atypical hemolytic uremic syndrome

Autosomal dominant, Autosomal recessive, Not applicable

All ages

Atypical hypotonia-cystinuria syndrome

Autosomal recessive

Infancy, Neonatal

Atypical juvenile parkinsonism

Autosomal recessive, Not applicable

Adolescent, Adult

Atypical lichen myxedematosus

Adolescent, Adult, Elderly

Atypical teratoid rhabdoid tumor

Not applicable

Antenatal, Childhood, Infancy, Neonatal

Auditory neuropathy-optic atrophy syndrome

Autosomal recessive

Adolescent, Childhood, Infancy

Autism spectrum disorder due to AUTS2 deficiency

Autosomal dominant

Infancy, Neonatal

Autism spectrum disorder-epilepsy-arthrogryposis syndrome

Autosomal recessive

Infancy, Neonatal

Autism-epilepsy syndrome due to branched chain ketoacid dehydrogenase kinase deficiency

Autosomal recessive

Childhood

Autoerythrocyte sensitization syndrome

Adult

Autoimmune encephalopathy with parasomnia and obstructive sleep apnea

Not applicable

Adult, Elderly

Autoimmune hemolytic anemia, warm type

Multigenic/multifactorial

All ages

Autoimmune hemolytic anemia-autoimmune thrombocytopenia-primary immunodeficiency syndrome due to TPP2 deficiency

Autosomal recessive

Childhood, Infancy

Autoimmune hepatitis

Not applicable

Adolescent, Adult, Childhood, Elderly