Disclosure statement
No potential conflict of interest was reported by the authors.
Author contributions
T Kitada, KK, RW, T Koyama, YN, MT, SY, and AM provided the patient’s care. T Kitada and KK wrote the original manuscript. RW, T Koyama, YN, MT, and SY reviewed and edited the manuscript. KO provided pathological analysis, and reviewed and edited the manuscript. AM validated the manuscript.