Received: 13 December 2018
Accepted: 20 February 2019
First Online: 28 February 2019
Ethics approval and consent to participate
: This case report was approved by the local ethics committee of Toranomon Hospital (approval number #1753-B, 2018/12/11).
: Written informed consent for publication of this case report and the associated images was obtained from the patient.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.