Any experience of lesions in the high suspensory?

[Cluny]

After extensive investigation yesterday, my mare was diagnosed with lesions on her high suspensorys in both hinds. She will have a course of shock wave therapy and is on box rest for two days, followed by very limited turn out for six weeks and walking out in hand. The vet mentioned that this condition is degenerative, which rather scares me. She is a very big moving
WB and is 11.

Has anyone else had experience of this condition and what was your treatment and outcome?

Thanks so much.