At a minimum, these SNPs are known to be related, and others may also be
There are multiple types of the disease:
- STGD1: The most common recessive form, associated with mutations in the ABCA4 or CNGB3 genes.
- STGD3: A rare dominant form, associated with mutations in the ELOVL4 gene.
- STGD4: Associated with mutations in the PROM1 gene.
(The STGD2 type designation is no longer used.)