For example, shortly after the publication of the newest version of the ISDS Nosology, Gray et al. [5] have shown that the Serpentine fibula polycystic kidney syndrome (SFPKS) is characterised by truncating mutations in NOTCH2, and consequently have proposed the move of SFPKS from the Filamin Group to the Osteolysis Group, due to its genetic similarities with the Hajdu-Cheney syndrome. This evidence concerns the gene NOTCH2 and acroosteolysis dominant type.