Supraspinatus Tendinosis and Mineralization: Same Disease Two Faces?

Key points • Supraspinatus tendinosis is characterized by an enlarged tendon insertion with myxomatous degeneration revealed by fluid intensity on MR imaging, and no inflammatory changes. • Supraspinatus tendinosis in dogs shows identical clinical presentation to the previously recognized calcifying supraspinatus tendinopathy, except the lack of a macroscopic calcified lesion. • The enlarged tendon may interfere with the function of the biceps tendon. • Surgical debridement of supraspinatus tendinosis may be of higher importance in dogs than in humans due to the anatomical arrangement of the canine cranial shoulder.