Any Brown-Vialetto-van Laere syndrome in which the cause of the disease is a mutation in the SLC52A3 gene. The disease is Brown-Vialetto-van Laere syndrome 1 (MONDO_0024537, a Monarch Disease Ontology entry). Also known as: Brown-Vialetto-Van Laere syndrome 1, Brown-Vialetto-van Laere syndrome caused by mutation in SLC52A3, RTD2, Riboflavin transporter deficiency 2, SLC52A3 Brown-Vialetto-van Laere syndrome, rfvt2-related riboflavin transporter deficiency.