All the reports that have been published on<unk>  have shown that the overall prevalence of the disease is about 4 cases per million individuals around the world. Due to<unk> 's disease (LD) being so rare, there have been very few case series documented. The prevalence of<unk>  varies throughout the world because of the differing customs of each country that it is present in. It is much more prevalent in countries that have higher cases of inbreeding. Usually, these locations are generally more isolated from the world at large. In the western countries the prevalence of<unk>  is much lower because of the greater city size and less isolated communities that would participate in inbreeding.
Lafora disease
Batten disease
Farber disease
Akureyri disease
Leber congenital amaurosis
Bayoud disease
Spastic ataxia-corneal dystrophy syndrome
Degos disease