S56.322 - Laceration of extensor or abductor muscles, fascia and tendons of left thumb at forearm level S56.3 - Injury of extensor or abductor muscles, fascia and tendons of thumb at forearm level S56.32 - Laceration of extensor or abductor muscles, fascia and tendons of thumb at forearm level S56.322 - Laceration of extensor or abductor muscles, fascia and tendons of left thumb at forearm level