Which layer of the retina is affected in X-linked retinoschisis?
Retina and Vitreous
Yes
U
D
Hereditary Retinoschisis
It is estimated that this much less common form of retinoschisis affects one in 5,000 to 25,000 individuals, primarily young males.
X-linkedrecessive.
The cystic, spoke-like foveal changes and loss of ERG b-wave are bilateral.
Various deleterious mutations inRS1encoding for retinoschisin are implicated.
In retinoschisis, the inner retina is split at the level of the nerve fiber layer, usually in the inferotemporal quadrant.
Degenerative Retinoschisis
This type of retinoschisis is very common with a prevalence of up to 7% in normal individuals.
Its etiology is unknown.
Degenerative retinoschisis is not known to be a genetically inherited condition.
There is always functional loss in the region of the schisis as there is a split in the outer plexiform layer resulting in a separation of the sensory retina from the ganglion layer.
Tractional Retinoschisis
This may occur in:
Vitreomacular traction syndrome
Proliferative diabetic retinopathy with vitreoretinal traction
Heads up! You can use keyboard for test navigation: press → for Next,
← for Previous, M for Mark/Unmark, P for Pause,
R for Review, A,B,C,... or 1,2,3,... to select answer.