Oh no! It looks a lot like the knee cap area was injured.
After the cast is opened, the real healing journey must begin. You will have about 14 days to make your knee area flexible again through physiotherapy.
My dad had that trouble. And he went through excruciating painful recovery. But now at least he can walk with just a walking stick.
Praying you will get well soon.
Thank you for your kind words ❤🙏