Received: 26 November 2019
Accepted: 28 April 2020
First Online: 27 May 2020
Ethics approval and consent to participate
: This study was approved by the ethics committee of Mitsui Memorial Hospital.
: Written informed consent was obtained from the patient for publication of this case report and any accompanying images. A copy of the written consent is available for review by the Editor-in- Chief of this journal.
: TO gas received speaker’s fees from Bayer Yakuhin and Eisai. The other authors declare that they have no competing interests.