Figure 1a. (a) Arthrogram of the right shoulder in a patient with calcific bursitis reveals a calcified nodule in the subdeltoid bursa (white arrowhead). Note the normal extension of contrast material into the axillary recess (black arrowhead), into the subscapular bursa (black arrow), and along the tendon sheath of the long head of the biceps brachii muscle (white arrow). (b) Anteroposterior radiograph of the right shoulder in a different patient with synovial osteochondromatosis shows the characteristic calcified nodules. Understanding of the normal joint anatomy is essential to realize that the calcified nodules are intraarticular in the axillary recess (arrowhead), in the subscapular bursa (black arrow), and extending along the biceps tendon sheath (white arrow).