S56.599 - Other injury of other extensor muscle, fascia and tendon at forearm level, unspecified arm S56.5 - Injury of other extensor muscle, fascia and tendon at forearm level S56.59 - Other injury of other extensor muscle, fascia and tendon at forearm level S56.599 - Other injury of other extensor muscle, fascia and tendon at forearm level, unspecified arm