Hi If you have MRI scan report , kindly write the impression written at the end of report or send scanned report to this forum or my email yyyyyyyyyyy@yyyyyyy.yyy If you buckle during walk, means cruciate ligaments and or meniscal injury may have occurred. You have a. Choice to show to an arthroscopic knee surgeon who can visualise the extent of damage by arthroscope and one who is expert in preparing ligaments and meniscal injury in same sitting Or else ,open surgery after Arthroscope if extensive lesions are there Wear a knee brace long one till you reach the arthroscopic surgeon for evaluation and avoid walking without knee support. Best wishes