Conflict of interest

Hiroaki Morinaga, Tomonori Miyabe, Yuya Mitsuhashi, Ken Kato, and Hiroyuki Tanaka declare that they have no conflicts of interest.

Ethical approval

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

Informed consent

Informed consent was obtained from the patient for the publication of the details of this case.