This podcast covers the JBJS issue for December 2011. Featured are articles covering: The In Vivo Linear and Volumetric Wear of Hip Resurfacing Implants Revised for Pseudotumor; recorded commentary by Dr. Keeney; Anabolic Steroids Reduce Muscle Damage Caused by Rotator Cuff Tendon Release in an Experimental Study in Rabbits; Diagnosis of Periprosthetic Joint Infection - The Utility of a Simple Yet Unappreciated Enzyme; recorded commentary by Dr. Scranton; Dynamic Ultrasound Assessment of the Effects of Knee and Ankle Position on Achilles Tendon Apposition Following Acute Rupture.