Any Senior-Loken syndrome in which the cause of the disease is a mutation in the NPHP1 gene. The disease is Senior-Loken syndrome 1 (MONDO_0009962, a Monarch Disease Ontology identifier). Also known as: NPHP1 Senior-Loken syndrome, Senior-Loken syndrome caused by mutation in NPHP1, Senior-Loken syndrome type 1, senior-loken syndrome-1.