The objective of this course is to present the normal and pathological aspects of the various periarticular structures of the shoulder, and the practical modalities of their analysis. The anatomy and pitfalls of tendon imaging is recalled, as well as the interest to detect intra and peri articular effusions. The semiological aspects of complete and partial tears of the rotator cuff and the various impingement syndromes, well demonstrated with dynamic sonography, are then studied. The examination requires time and knowledge but the diagnostic and therapeutic impact is very important regarding the low cost of this technique. The standardisation of the procedure and the production of normal reference images seems to guarantee a global increase in quality of the sonographic examinations.