Usher Syndrome, Type IB (MYO7A)

Usher syndrome type 1B is an autosomal recessive, pan-ethnic disease caused by pathogenic variants in the gene MYO7A. The disease is characterized by congenital bilateral sensorineural deafness, which may be treated by cochlear implants; hearing aids do not help. Progressive loss of vision due to retinitis pigmentosa begins in childhood. Retinitis pigmentosa first presents with night blindness, but progresses to tunnel vision and eventually blindness. Patients also have problems with their balance and therefore experience developmental delay. The presence of several specific variants result in a later-onset Usher syndrome, called Usher syndrome III. Life expectancy is not reduced.









Disease Name
 GeneGuaranteed Exons 
 Inheritance Ethnicity
 Carrier Frequency
 Detection Rate
Residual Risk

Usher Syndrome, Type IBMYO7A3-18, 20, 21, 23-25, 28-31, 34-45 [49] (*33)ARCaucasian1 in 14552%0.00332225913621262
Usher Syndrome, Type IBMYO7A3-18, 20, 21, 23-25, 28-31, 34-45 [49] (*33)ARAfrican< 1 in 50013%0.00173913043478261
Usher Syndrome, Type IBMYO7A3-18, 20, 21, 23-25, 28-31, 34-45 [49] (*33)ARAsian1 in 6245%0.00892857142857143
Usher Syndrome, Type IBMYO7A3-18, 20, 21, 23-25, 28-31, 34-45 [49] (*33)ARWorldwide1 in 20645%0.00267379679144385