This figure illustrates a series of infrared spectra obtained for a set of standards (calcite, calcium oxalate, hydroxyapatite,), for a site of a Yasue-positive papillary, for a site of a Yasue-positive interstitial NIPS deposit from HASF patient 3, intraluminal deposit mineral from HASF patient 5, and for normal tissue with embedding medium. The mineral type in the papillary intraluminal and NIPS deposits were identical to the hydroxyapatite standard. All deposits analyzed from the eleven HASF patients were HA.