Ultrasound is an increasingly important component of diagnostic imaging for musculoskeletal disorders. This issue of Ultrasound Clinics features the following articles: Rotator Cuff Pathology and Beyond; Common Elbow Pathologies; Ultrasound of the Wrist and Hand; Ultrasound of the Groin; Ultrasound of the Knee; Ultrasound of the Ankle and Foot; Ultrasound of Skin Lumps and Nail Pathology; Ultrasound of Peripheral Nerve Imaging; Rheumatologic Applications of Ultrasound; and Ultrasound Guided Procedures for Soft Tissue Masses.