<prompt> Patient sustains twisting type of injury followed by recurrent locking of knee. Most likely structure to be injured is-Menisci injuryAnterior cruciate ligament injuryAvulsed tibial tuberosityLateral collateral ligament injury  <response>: Twisting type of injury of knee followed by recurrent locking of knee-suggestive of meniscal tear. Causes of Meniscus Injuries Can result from activities involving pivoting or rotational movements -- i.e. pivoting, sudden stops and turns, kneeling, deep squatting, heavy Tears in the meni cus of the knee are commonly due to spos-rela ed injuries Degenerative cha ges of the knee can contribute to a torn meniscus Meniscal tears may be associated with anterior cruciate ligament tears -- The instability of the knee increases the likelihood of a meniscal tear over time Ref: Murcer 9the p.1126-41 