This podcast covers the JBJS issue for April 2016. Featured are articles covering Predictors of Revision Surgical Procedure in Adult Spinal Deformity; The Role of Blood Metal Ions in Patients with Unilateral Metal-on-Metal Hip Implants; recorded commentary by Dr. Dorr; Clinical and Radiographic Outcomes of the Simpliciti Canal-Sparing Shoulder Arthroplasty System - A Prospective Two-Year Multicenter Study; Activity Level and Dysplasia Severity Predict Age at Osteotomy for Symptomatic Hip Dysplasia; Radial Head Fractures Treated with Modular Metallic Radial Head Replacement - Outcomes at a Mean Follow-up of Eight Years.