Received: 7 January 2020
Accepted: 25 March 2020
First Online: 7 April 2020
Ethics approval and consent to participate
: The study was approved by the institutional review board of the International Peace Maternity and Child Health Hospital in Shanghai, China.
: A written informed consent to publish the report and associated medical images was obtained from the patient.
: We declare that we do not have any conflict of interest.