S86.21 - Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level S86.2 - Injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level S86.21 - Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level S86.211 - Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg S86.212 - Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left leg S86.219 - Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified leg