ABSTRACT
This biconcave deformity of the vertebral endplates is seen in many disorders (Figure 1). Donald Resnick’ (University of California and VA Medical Center, San Diego) lists osteoporosis, osteomalacia, hyperparathyroidism and Paget’s disease among them. ‘The centra of an elderly subject showing the classic biconcave contour of the sort commonly caused by osteoporosis for which the term ‘fish vertebra deformity’ was originally coined.’ Reprinted from Reynolds<xref ref-type="bibr" rid="ref18_2"> <sup>2</sup> </xref> a re-evaluation of the ‘fish verteba’ sign in sickle cell hemoglobinopathy. <italic>Am. J. Roentgenol.,</italic> 97, 693–707, with permission of the ARRS https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781003076568/34c29fd5-5662-4e8f-b58c-badd7fa5d724/content/fig18_1_B.jpg"/>
