The objective of this study was to search for the deletion of exon 24 and exons 24-27 that had been previously reported in Italian patients affected by pseudoxanthoma elasticum, anb autosomal recessive disorder characterized by calcification and fragmentation of elastic fibers as a conseguence of mutations in the ABCC6 gene. To detect deletions in the ABCC6 gene the development and use of long range PCR procedure using appropriately designed primers are described.