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Authors
Oiwa, Shutaro
Sagawa, Tamotsu
Watabe, Hayato
Hirakawa, Masahiro
Uesugi, Atsushi
Yoshida, Makoto
Nagashima, Hiroyuki
Fujikawa, Koshi
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Article History
Received: 11 March 2026
Accepted: 20 May 2026
First Online: 26 May 2026
Declarations
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: This study was conducted in accordance with the Declaration of Helsinki. The study protocol was reviewed and approved by the institutional review board of Hokkaido Cancer Center (approval number: No. 07–11).
: Due to the retrospective nature of this case series, the requirement for written informed consent was waived by the institutional review board, and an opt-out consent procedure was implemented.
: The authors affirm that informed consent for publication of all images included in this article was obtained from the patients.
: The authors declare no competing interests.
