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. 2018 Oct 9;6(10):2325967118801009. doi: 10.1177/2325967118801009

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© The Author(s) 2018

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 License (http://www.creativecommons.org/licenses/by-nc-nd/4.0/) which permits non-commercial use, reproduction and distribution of the work as published without adaptation or alteration, 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 3. — Arthroscopic images of the trochlear groove of a (A) left and (B) right knee. The left knee demonstrates an International Cartilage Repair Society (ICRS) grade 3 to 4 lesion, while the right knee demonstrates an ICRS grade 1 (softening only) lesion.