<unk>  is considered an ultra-rare disorder and has only been diagnosed in less than 50 individuals in literature. KRS is rare, so it is likely that it is often underdiagnosed and the prevalence is higher than is reported in the literature. KRS mutations have been identified in families from China, Jordan, Pakistan Chile, and Afghanistan.
Kufor–Rakeb syndrome
Kufs disease
Zunich–Kaye syndrome
Irlen syndrome
Simpson–Golabi–Behmel syndrome
Naxos syndrome
Cornelia de Lange syndrome
Letterer–Siwe disease