A full discussion of the subject of subdeltoid bursitis is not possible here, and therefore only that phase in which the condition is associated with a deposit will be considered. A full study of both the acute and the chronic form may be obtained by reading the articles referred to in the footnotes.
In 1906, Codman1 gave a most complete discussion of the anatomy of the bursae about the shoulder. From this study it was clearly shown that the subacromial and the subdeltoid bursae were identical and the names synonymous. The bursa is composed of thin walls and contains but little fluid. There is no communication with the shoulder joint. Lying directly beneath and intimately connected with the bursa is the tendon of the supraspinatus muscle. It is also in close proximity to the subscapular and the infraspinatus tendons, thus playing a rôle in rotation of the humerus. On