Authorship list:
Author Contributions:
Kie Yamashiro , Katsuhisa Sekido, Yasushi Hariya contributed to the
manuscript preparation. Michiko Okita, Masashi Harada, Yasushi Hariya,
and Masaharu Tatetsu contributed to the patient management. All authors
read and approved the final manuscript.
Acknowledgments: The authors would like to thank Dr. Eiji
Nakayama, Professor at Health Sciences University of Hokkaido, for
assistance with diagnostic imaging, and Dr. Tomoyuki Oouchi, Chief of
the Department of Pathology at Keiyukai Sapporo Hospital, for assistance
with the pathological investigation.