Conflict of interest

Megumi Suzuki, Keita Shibata, Naoko Ikeda, Yui Omomo, Kanako Sugou, Kaoru Tanno, Hiroki Yamaguchi declare that they have no conflict of interest.

Ethics and consent

All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later versions.

Informed consent

Informed consent was obtained from the patient in this case report.