AHSG and neuroblastoma: The study by Raoult et al. [19] makes significant advances to our understanding of NB biology by conferring at last some biochemical specificity to the previously elusive NB entity and by linking NB for the first time to the biology of fetuin-A, a potent inhibitor of extraskeletal calcification and apatite formation [21], [22] that has recently been shown to form colloidal complexes with calcium and phosphate [23]–[27].