Posterior Sag Sign for PCL Tears Let's move on to the posterior cruciate ligament and how to assess injuries of it! The Posterior Sag Sign makes use of the fact that the tibia is translating posteriorly due to gravity in case of a torn PCL. Watch the test is carried out! According to a study by Rubinstein et al. (1994), the Posterior Sag Sign has a sensitivity of 79% and a specificity of 100%. | Physiotutors

KNEE ASSESSMENT SERIES PART 13: POSTERIOR SAG SIGN FOR PCL ASSESSMENT Like mentioned yesterday, with a ruptured PCL, your tibia might sag posteriorly on the femur. This is also how you assess for the Posterior sag sign, when you let gravity pull the tibia backwards. Watch out for the presence of this sign if you want to do your ACL assessment, because a ruptured PCL might give you a false negative test outcome with ACL assessment! | Physiotutors