Knee injury...?

ok i injured my knee back in June(see other ?'s) and have to date had 4 months of therapy, 3 cortizone injections, 2 MRI's; both of which only show the injury to my MCL. However when i went back to the Doctor on December 18th he had mentioned doing a scope to "see if the MRI had missed anything" he said that for now it could be put off and was up to me how soon we did the surgery. I have two questions.
1. Is it possible that the MRI missed an injury to another structure?
2. If i decide to have the scope done now what is the expected down time, will i be out for the rest of the competitive cheer season(i have an 8 week break from Feb 9-April 6) or should i be ok to compete in April?
3. If i decide to try and wait until the end of April(end of the season) what additional damage can i cause to my knee?
here are my current symptoms:
*moderate to severe pain medially when squatting, poviting, and cutting
*sharp stabbing pain if i turn my foot inwards(deep within the medial side)

*after riding stationary bike, knee feel as though it may buckle(relatively new symptom)
*"catching" feeling while walking(just started happening)

If anyone can give me any advise that would be great...

I go back to the Doctor on Jan. 17th; and just wanted to know if i could continue with just therapy or if i should go ahead and do the surgery now...

thanks again

I just had knee scope surgery 10 days ago - I had tore my menscus same type symptoms and had cartlidge damage the surgery took 45 mins I went home 1 hour after was in bed maybe 24 hours then slowly back walking , I was on full crutches 2-3 days and 1 crutch a couple more I started therapy yesterday I am nearly walking normal I have no pain just swelling and tightness everyday is better. My leg feels so much better since the surgery

sorry im not a doctor so i dont know.. but i know how you feel! i tore my ACL when i was in second grade! my doctor couldnt believe it cause i was so young. i had about 6 surgeries on it and took about 4 months of therapy. i did have the scope thingy too, i hated it, i still have problems with my knee (not bad problems) i just cant sit on it. and im 20! but i would do the surgery. im glad i did! so good luck with everything!

my son just recovered from ACL injury. Do not do anything with it until you are fixed up. You can cause perminent damage. Don't leave these things to long if you need surgery.Surgery done to soon or too late after the injury makes a difference on how you heal. My son had surgery in DEC and was back playing full copacity football 6 months later with no sign of injury, and full motion back. I thought the scope was used BEFORE the MRI with the MRI being the final tool. Maybe seek a second opinion here.
good luck!

1. yeah it is possible that the MRI missed something, but its not likely.
2. There is no telling how much down time you'll have. Everyones differnt and recovery times are different. Just take it easy and you'll be fine.
3. Im not sure but after its done if u overdo yourself i know u can have some additional damage. Be Careful Dea.

Hope everything goes ok.
Love ya!