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Choroideremia (/ k ɒ ˌ r ɔɪ d ɪ ˈ r iː m i ə /; CHM) is a rare, X-linked recessive form of hereditary retinal degeneration that affects roughly 1 in 50,000 males. The disease causes a gradual loss of vision, starting with childhood night blindness, followed by peripheral vision loss and progressing to loss of central vision later in life.
Choroideremia-deafness-obesity syndrome This condition is inherited in an X-linked recessive manner. Ayazi syndrome (or Chromosome 21 Xq21 deletion syndrome ) [ 1 ] is a syndrome characterized by choroideremia , congenital deafness and obesity .
Diagnosis requires exclusion of other neurological, ophthalmological, and systemic conditions. [3] Any cause of optic neuropathy should be ruled out, including demyelinating (MOG antibody disease, multiple sclerosis, and neuromyelitis optica) and systemic disease (diabetic, toxic, nutritional, and infectious causes). [3]
Symptoms for the condition include. [1] Abnormal electroretinogram; Acrokeratosis; Anhidrotic ectodermal dysplasia; Choroideremia; Heat intolerance; High myopia; Horizontal nystagmus; Intellectual disability; Recurrent respiratory infections; Recurrent skin infections; Scapular winging; Unfavorable response of muscle weakness to acetylcholine ...
Leber's hereditary optic neuropathy (LHON) is a mitochondrially inherited (transmitted from mother to offspring) degeneration of retinal ganglion cells (RGCs) and their axons that leads to an acute or subacute loss of central vision; it predominantly affects adult males, and onset is more likely in younger adults.
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However, the disease can seem to re-present a second time with further vision loss due to the early onset of presbyopia symptoms (i.e., difficulty in viewing objects up close). [1] DOA is characterized as affecting neurons called retinal ganglion cells (RGCs). This condition is due to mitochondrial dysfunction mediating the death of optic nerve ...