Null syndrome

X-linked recessive

Childhood

O'Sullivan-McLeod syndrome

Adult

OBSOLETE: Cleft lip-retinopathy syndrome

Antenatal

OBSOLETE: Primary intraocular lymphoma

Not applicable

Adult

OBSOLETE: X-linked retinal dysplasia

Childhood

OSLAM syndrome

Autosomal dominant

Neonatal

Obesity due to CEP19 deficiency

Autosomal recessive

Childhood

Obesity due to SIM1 deficiency

Autosomal recessive

Infancy, Neonatal

Obesity due to congenital leptin deficiency

Autosomal recessive

Childhood

Obesity due to leptin receptor gene deficiency

Autosomal recessive

Childhood, Infancy

Obesity due to melanocortin 4 receptor deficiency

Autosomal dominant, Autosomal recessive

Infancy, Neonatal

Obesity due to pro-opiomelanocortin deficiency

Autosomal recessive

Infancy, Neonatal

Obesity due to prohormone convertase I deficiency

Autosomal recessive

Infancy, Neonatal

Obesity-colitis-hypothyroidism-cardiac hypertrophy-developmental delay syndrome

Unknown

Infancy, Neonatal

Oblique facial cleft

Infancy, Neonatal

Occipital encephalocele

Autosomal dominant

Occipital horn syndrome

X-linked recessive

Childhood, Infancy, Neonatal

Occipital pachygyria and polymicrogyria

Autosomal recessive

Infancy, Neonatal

Occult macular dystrophy

Autosomal dominant

All ages

Ocular albinism with late-onset sensorineural deafness

X-linked recessive

Adult

Ocular anomalies-axonal neuropathy-developmental delay syndrome

Autosomal dominant

Infancy, Neonatal

Ocular cystinosis

Autosomal recessive

Adult

Ocular motor apraxia, Cogan type

Autosomal recessive

Childhood

Ocular surface squamous neoplasia

Adolescent, Adult, Childhood, Elderly