Calcific tendinopathy of the rotator cuff is the formation of a small calcium deposit in the context of a tendinous structure. The size of the tendon calcification can vary from a few millimeters up to about 2 cm. It affects patients aged between 30 and 40 years, with a slight prevalence in women. The etiology is not clear and the hypotheses are different, linked to risk factors, work and sports activities. Calcific tendinopathy is a painful condition, and pain and functional limitation are linked to the late phase of the calcific process, when phenomena of reabsorption and repair of the tendon occur. The initial stages are asymptomatic and the finding of tendon calcifications can be occasional. Imaging must be able not only to reveal the calcifications and to identify the tendinous structure involved, but also, if possible, to determine at what phase the calcific process is.