An autosomal recessive, multisystem condition caused by pathogenic variants of the PNPLA6 gene, encoding the patatin like phospholipase domain containing 6 protein. RAPH syndrome is characterized by hypogonadism, cerebellar ataxia, retinal dystrophy, peripheral neuropathy, growth hormone deficiency, and cognitive impairment. Additional clinical features may include lower limb spasticity, trichomegaly, alopecia, and facial dismorphism. The term lumps Boucher-Neuhauser, Gordon Holmes, Laurence-Moon, and Oliver-McFarlene syndromes.