MRI and arthroscopy correlations of the shoulder: a case-based approach.

Over the past three decades, shoulder arthroscopy and MRI have seen significant advancements. Initially, distinguishing between normal and pathologic anatomy was one of the greatest challenges. Radiologists and arthroscopic shoulder surgeons have provided feedback to each other based on their experiences with selected shared patients, thereby accelerating the understanding of the arthroscopic and MRI appearance of both normal and pathologic anatomy. This process has led to the current refined understanding of both the basics and subtleties of MRI and arthroscopy correlations in the shoulder. Using a case-based approach provides examples of the correlation between MRI and arthroscopic findings in selected shoulder conditions.