S76.312 - Strain of muscle, fascia and tendon of the posterior muscle group at thigh level, left thigh S76.3 - Injury of muscle, fascia and tendon of the posterior muscle group at thigh level S76.31 - Strain of muscle, fascia and tendon of the posterior muscle group at thigh level S76.312 - Strain of muscle, fascia and tendon of the posterior muscle group at thigh level, left thigh