22 yrs old soccer player presents with right knee pain and swe | sᴘᴏᴛ ᴅɪᴀɢɴᴏsɪs

22 yrs old soccer player presents with right knee pain and swelling, patient recall Hx of knee trauma in which he heared a "Popping sound" after which he felt severe pain and swelling, O/Ex + Lachman test. Your diagnosis :