I am trying to understand the anatomy of my injury.
How it happened: I was cutting to the left in basketball. My right knee popped 3 times and I felt sharp pain. Immediately after the injury I couldn't extend my leg any more.
Extension: I can extend it to about 20-30 deg from straight. After that I get a sharp pain in anterior-medial below the patella (where the meniscus is).
Flexion: After the injury I could flex it almost all the way. Two days after it locks 45 degrees from fully bent. At that point I get a sharp pain in posterior-lateral region of the knee (in the knee crevice).
General: I can put moderete weight on my leg, but can't walk without crutches because I cannot straighten it.
History: I had the exact same injury (simptoms) 2 times in my life before. Each time, I would stay in bed 2-3 weeks and could limp. A month or two and I could walk/run. I also had an ACL surgery 8 months ago (after those two times).
Question: I can't understand why my knee locks. The general belief is that a part of meniscus is stuck underneath the knee and this is in line with my immediate locking. However, I feel like it doesn't explain why I am able to region the range of motion 2-3 weeks after the injury. Is there any other explanation?