Received: 3 April 2020
Accepted: 9 June 2020
First Online: 16 June 2020
Ethics approval and consent to participate
: This study was performed in accordance with the Ethical Guidelines for Medical and Health Research Involving Human Subjects by the Ministry of Health, Labour, and Welfare of Japan in 2014. The study complied with the 1964 Declaration of Helsinki (revised in 2013) and was approved by the local ethics committee of Kagoshima University Hospital (registration number: 27-119). Parents of the patient provided their informed consent for involvement in this study.
: Written informed consent was obtained from the parents of the patient for the publication of this case report and any accompanying images.
: The authors declare that they have no competing interests.