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. 2021 May 20;49(5):03000605211015559. doi: 10.1177/03000605211015559

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© The Author(s) 2021

Creative Commons Non Commercial CC BY-NC: This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 1. — Results of lumbar spine radiography, computed tomography (CT), and magnetic resonance imaging (MRI) of the 7-year-old first-born son. Spondylolysis (white arrows) is observed at the fifth lumbar vertebra (L5) on posteroanterior (a), lateral (b), 45° right anterior oblique (c), and 45° left anterior oblique (d) radiographs and right parasagittal (e), left parasagittal (f), and axial CT images parallel to the L5 vertebral arch (g). Axial short tau inversion recovery (STIR)-MRI parallel to the L5 vertebral arch (h) and coronal STIR-MRI (i). Note the signal hyperintensity (white arrows) in the pedicle, indicating marrow edema. This is a sign of an early-stage stress fracture of the pars interarticularis.