Quiz Page Answers November 2005   American Journal of Kidney Diseases  Volume 46, Issue 5, Pages e71-e73 (November 2005) DOI: 10.1053/j.ajkd.2005.08.023 Copyright © 2005 Terms and Conditions

Figure 45A Radiograph of the left hand. What do you observe? This image shows increased cortical thickness and density of the bones of the hand and wrist, with bone-in-bone appearance in the metacarpal bones suggestive of osteopetrosis. In addition, there is an old avulsion fracture of the base of the proximal phalanx V. American Journal of Kidney Diseases 2005 46, e71-e73DOI: (10.1053/j.ajkd.2005.08.023) Copyright © 2005 Terms and Conditions

Figure 45B What does this dual-energy x-ray absorptiometry scan show? This scan shows increased bone mineral density of the lumbar vertebrae (z score, +5.4). Here the increased cortical thickness is even more striking. American Journal of Kidney Diseases 2005 46, e71-e73DOI: (10.1053/j.ajkd.2005.08.023) Copyright © 2005 Terms and Conditions

Figure 45C Computed tomographic scan of the head. This revealed intracranial calcifications in the caudate nucleus (arrows) typical for carbonic anhydrase type II deficiency. American Journal of Kidney Diseases 2005 46, e71-e73DOI: (10.1053/j.ajkd.2005.08.023) Copyright © 2005 Terms and Conditions