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. 2021 Sep 3;10(2):449–455. doi: 10.1007/s43390-021-00408-1

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 3 — Comparison of UIVFA between patient with and without PJK at 2-year follow-up. a UIVFA of PJK patient at preop, immediate postop and 6-month postop. At immediate postop, patient’s UIVFA is 17° which is greater than the optimal 11.5° cut-off. b UIVFA of patient without PJK at preop, immediate postop and 2-year postop. At immediate postop, patient’s UIVFA is 10° which meets the optimal 11.5° cut-off