Received: 29 October 2020
Accepted: 28 December 2020
First Online: 13 January 2021
Ethics approval and consent to participate
: The case report was approved by the Ethics Committee of the Faculty of Medicine, Yamagata University (#2020-S-41), and an informed consent was obtained.
: Informed consent was obtained for the publication of this report and accompanying images.
: The authors declare that they have no competing interests.