Rare Disease Index

9,491 diseases
Opsismodysplasia
Opsismodysplasia is a skeletal dysplasia characterized by congenital dwarfism and facial dysmorphism
ICD: Q77.8MeSH: C537122
opsoclonus myoclonus syndrome
rare disease
MeSH: D053578
optic atrophy
disorder characterized by loss of optic nerve fibers. It may be inherited or acquired. Acquired causes include ischemia, optic nerve neuropathy, glaucoma, trauma, radiation, brain tumors, and multiple sclerosis. It leads to vision disturbances
MeSH: D009896
optic atrophy 6
human disease
MeSH: C537127
optic atrophy 7
human disease
optic atrophy 8
human disease
optic atrophy with or without deafness, ophthalmoplegia, myopathy, ataxia, and neuropathy
human disease
optic atrophy-intellectual disability syndrome
human disease
optic nerve edema-splenomegaly syndrome
human disease
optic nerve hypoplasia
human disease
ICD: Q14.2MeSH: D000080344
oral erosive lichen
human disease
oral submucous fibrosis
human disease
MeSH: D009914
oral-facial-digital syndrome
genetic disease that is characterized by malformations of the face, oral cavity, and digits with polycystic kidney disease and variable involvement of the central nervous system and has material basis in X-linked inheritance of an OFD gene
MeSH: D009958
orbital leiomyoma
organic acidemia
amino acid metabolic disorder that disrupts normal amino acid metabolism causing a building up of branched-chain amino acids
ICD: E70
organic brain syndrome
syndrome or disorder of mental function whose cause is alleged to be known as organic (physiologic) rather than purely of the mind
ICD: F06.9MeSH: D019965
orgasm-induced seizures
ornithine carbamoyltransferase deficiency
urea cycle disorder that involves a mutated and ineffective form of the enzyme ornithine transcarbamylase
MeSH: D020163
ornithine translocase deficiency
amino acid metabolic disorder that has material basis in deficiency of ornithine translocase resulting in the accumulation of ammonia in the blood
MeSH: C538380
orofacial clefting syndrome
human disease
orofaciodigital syndrome I
orofaciodigital syndrome characterized_by polycystic kidney disease and variable involvement of the central nervous system and has_material_basis_in X-linked inheritance of the OFD1 gene
orofaciodigital syndrome III
Human disease
MeSH: C557817
orofaciodigital syndrome IV
Human disease
MeSH: C537133
orofaciodigital syndrome IX
Human disease
MeSH: C557818
orofaciodigital syndrome type 12
MeSH: C548034
orofaciodigital syndrome type 13
MeSH: C548035
orofaciodigital syndrome type 14
orofaciodigital syndrome V
Human disease
MeSH: C557819
orofaciodigital syndrome VII
Human disease
MeSH: C563104
orofaciodigital syndrome VIII
human disease
MeSH: C557820
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