Although the deletions identified in the two studies are slightly different in extension, the deletions all overlap and determine the loss of genes starting from HDAC4. Moreover, from a clinical point of view, we observed a certain similarity with the patients described in the present paper, as iPPSD3 patients showed PTH resistance and signs of AHO. This evidence concerns the gene HDAC4 and pseudohypoparathyroidism type 1A.