'Mallet finger' also 'baseball finger'. It results from hyperflexion of the extensor digitorum tendon, and usually occurs when a ball (such as a softball, basketball, or volleyball), while being caught, hits an outstretched finger and jams it - creating a ruptured or stretched extensor digitorum tendon. Treatment options include surgery or putting the finger in a Mallet Splint for 6 to 8 weeks or extension block Kirschner wire for 4 weeks. The splint allows the tendon to return to normal length, if the finger is bent during these weeks the healing process must start all over again. Surgery is used to reattach the tendon and is usually performed within a week of the injury. Patients that present with mallet finger will have pain at the DIP joint, and will be unable to extend the joint. It should be determined via radiograph if the Extensor Digitorum tendon has avulsed from the phalange, which will require surgical intervention to reattach the tendon and should be done within 10 days of the injury. Surgical treatment is used when the mallet finger presents as an open injury or if the bony mallet involves more than 30% of the articular surface of the joint. If passive extension cannot be achieved, surgery will put the finger in a neutral position and drill a wire through the DIP to the PIP, forcing immobilization and eliminating patient compliance for re-injury.