S-L syndrome is a rare entity that has been reported in many families worldwide [6–8], including two different Arab families from Qatar and Saudi Arabia [9,10]. Here, we have investigated an Arab family with two children affected with S-L syndrome. A novel mutation in exon 12 of IQCB1/NPHP5 gene was identified; named c.1241-1242delTC, which is predicted to result in a premature protein truncation (p.leu414HisfsStop4). The gene has been termed the classical S-L gene because its mutations have been only associated with renalretinal phenotype [5].