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Article History

Received: 7 October 2019

Accepted: 4 October 2021

First Online: 13 June 2022

Declarations

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: All study procedures were performed in accordance with the Declaration of Helsinki and the Good Clinical Practice guidelines. The study protocol was approved by the Kurume University Hospital (approval nos. 8 and 106) and performed in accordance with the experimental guidelines of the Japanese Orthopaedic Association Corporation as a part of the research on intractable diseases under the Ministry of Health, Labour and Welfare of Japan. An anonymous prospective study was conducted, following the Freezerworks (Dataworks Development, Inc, WA, USA) validation procedures, as per the US Food and Drug Administration guidelines, on a Japanese OPLL patient during a follow-up period from 2017 to 2019. Informed written consent was obtained from all patients before the study, and patient care was unaffected by study participation.

: Written informed consent was obtained from the patient for publication of this case report and accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal.

: This article received no support from any funding agency, commercial business, or not-for-profit institution. The authors have had no commercial conflict of interests.