Received: 9 June 2021
Accepted: 30 June 2021
First Online: 8 July 2021
: This case report was examined and reported in compliance with the Helsinki Declaration. The natural history study of patients with spastic phenotypes was approved by the Institutional Review Board of the University of Tübingen, reference number (690/2011BO1).
: Written informed consent was obtained which included consent for publication.
: The authors declare that they have no competing interests.