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Items: 6

1.

Retinitis pigmentosa

Retinitis pigmentosa (RP) refers to a heterogeneous group of inherited ocular diseases that result in a progressive retinal degeneration affecting 1 in 3,000 to 5,000 people (Veltel et al., 2008). Symptoms include night blindness, the development of tunnel vision, and slowly progressive decreased central vision starting at approximately 20 years of age. Upon examination, patients have decreased visual acuity, constricted visual fields, dyschromatopsia (tritanopic; see 190900), and the classic fundus appearance with dark pigmentary clumps in the midperiphery and perivenous areas ('bone spicules'), attenuated retinal vessels, cystoid macular edema, fine pigmented vitreous cells, and waxy optic disc pallor. RP is associated with posterior subcapsular cataracts in 39 to 72% of patients, high myopia, astigmatism, keratoconus, and mild hearing loss in 30% of patients (excluding patients with Usher syndrome; see 276900). Fifty percent of female carriers of X-linked RP have a golden reflex in the posterior pole (summary by Kaiser et al., 2004). Juvenile Retinitis Pigmentosa Autosomal recessive childhood-onset severe retinal dystrophy is a heterogeneous group of disorders affecting rod and cone photoreceptors simultaneously. The most severe cases are termed Leber congenital amaurosis (see 204000), whereas the less aggressive forms are usually considered juvenile retinitis pigmentosa (Gu et al., 1997). Autosomal recessive forms of juvenile retinitis pigmentosa can be caused by mutation in the SPATA7 (609868), LRAT (604863), and TULP1 (602280) genes (see LCA3, 604232, LCA14, 613341, and LCA15, 613843, respectively). An autosomal dominant form of juvenile retinitis pigmentosa (see 604393) is caused by mutation in the AIPL1 gene (604392). [from OMIM]

MedGen UID:
20551
Concept ID:
C0035334
Disease or Syndrome
2.

Rod-cone dystrophy

Progressive rod photoreceptor dysfunction and loss that leads to night blindness and loss of peripheral visual field, either as the prevailing problem or occurring at least as severely as cone dysfunction. Occurs most often as retinitis pigmentosa (Hereditary degeneration and atrophy of the retina). [from HPO]

MedGen UID:
504473
Concept ID:
CN000477
Finding
3.

Autosomal dominant inheritance

Autosomal dominant inheritance refers to genetic conditions that occur when a mutation is present in one copy of a given gene (i.e., the person is heterozygous). [from NCI]

MedGen UID:
141047
Concept ID:
C0443147
Genetic Function; Intellectual Product
4.

Retinal dystrophy

A group of disorders involving predominantly the posterior portion of the ocular fundus, due to degeneration in the sensory layer of the RETINA; RETINAL PIGMENT EPITHELIUM; BRUCH MEMBRANE; CHOROID; or a combination of these tissues. [from MeSH]

MedGen UID:
208903
Concept ID:
C0854723
Disease or Syndrome; Finding
5.

Hereditary eye diseases

Transmission of gene defects or chromosomal aberrations/abnormalities which are expressed in extreme variation in the structure or function of the eye. These may be evident at birth, but may be manifested later with progression of the disorder. [from MeSH]

MedGen UID:
41933
Concept ID:
C0015398
Disease or Syndrome
6.

Congenital chromosomal disease

Clinical conditions caused by an abnormal chromosome constitution in which there is extra or missing chromosome material (either a whole chromosome or a chromosome segment). (from Thompson et al., Genetics in Medicine, 5th ed, p429) [from MeSH]

MedGen UID:
3441
Concept ID:
C0008626
Congenital Abnormality; Disease or Syndrome
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