GALNT3 and Tooth abscess: Case reports for HFTC1 patients with FGF23 and GALNT3 mutations include dental phenotypes characterized by thistle shaped roots, obliteration of pulp chambers and root canals, enamel defects, and increased incidence of dental abscesses (Figure 2o–r; Foster, Ramnitz, et al., 2014; Lee et al., 2021).