[Incidence of vertebral hyperostosis in patients with calcified tendinitis of the shoulder. Prospective study].

A vertebral hyperostosis was reported in 54.3 p. cent of the cases in 46 patients with calcified tendinitis of the shoulder, in 12.5 p. cent of the cases in 32 patients with a simple tendinitis of the shoulder and in 9.6 p. cent of the cases in 62 control patients without any scapular symptoms nor shoulder calcifications. The possible explanations of this significant association between vertebral hyperostosis and calcified tendinitis are considered.