Quiz Page February 2015 American Journal of Kidney Diseases Giorgina B. Piccoli, MD, Marco A. Cimmino, MD, Merit Lamp, MD, Fabio Gotta, MD, Federica N. Vigotti, MD, Adriano M. Priola, MD, Andrea Veltri, MD, Paola Mandich, MD  American Journal of Kidney Diseases  Volume 65, Issue 2, Pages A17-A19 (February 2015) DOI: 10.1053/j.ajkd.2014.10.007 Copyright © 2015 National Kidney Foundation, Inc. Terms and Conditions

Figure 1 Pedigree shows family members with a history of kidney stones and/or recurrent renal colic (dark shading). The arrow indicates the 17-year-old proband. American Journal of Kidney Diseases 2015 65, A17-A19DOI: (10.1053/j.ajkd.2014.10.007) Copyright © 2015 National Kidney Foundation, Inc. Terms and Conditions

Figure 2 Patient sonograms; consistent with grade 1 medullary nephrocalcinosis. (A) Longitudinal sonogram shows punctate hyperechoic foci deposited in the outer part of the renal pyramids in a linear fashion (arrows). Note the peripheral involvement with central sparing. A small anechoic cyst in the central part of one pyramid is seen. (B) Transverse sonogram demonstrates increased echogenicity involving a renal pyramid (arrow). These foci of increased echogenicity are consistent with crystal deposition and calcification. American Journal of Kidney Diseases 2015 65, A17-A19DOI: (10.1053/j.ajkd.2014.10.007) Copyright © 2015 National Kidney Foundation, Inc. Terms and Conditions