Performance and Safety Evaluation of MD-Shoulder Collagen Medical Device in the Treatment of Rotator Cuff Syndrome

"Only one experimental group is scheduled by the Investigation Plan to be treated with 2-mL volume ultrasound-guided infiltrations of MD-Shoulder Collagen Medical Device (GUNA, Milan-Italy).~Subjects will be treated with number one ultrasound-guided infiltration at the time of enrollment, 2 weeks after enrollment, and 4 weeks after enrollment.~Intra-articular infiltrations will be performed with 5cc syringes and 22-gauge needles.~MD-Shoulder Collagen Medical Device will be infiltrated within the scapulohumeral joint under conditions of complete asepsis."