. Journal of roentgenology . the greater tuber-osity of the humerus. I have reasons to believe that subacromial bursitis isneither infectious nor toxic in origin. In all of the eighteen patients I have operated on, I foundthe same lesion in the bursa—adhesions between its twowalls. 18 274 THE JOURNAL OP ROENTGENOLOGY The lime deposit is not in the bursa, or in its walls. Itlies under the bursa, either wholly within the supraspinatustendon, or on it, or partly within and partly on it. Thetendon may have to be split to reveal the deposit or depos-its, or the calcareous mass may be plainly seen l
. Journal of roentgenology . the greater tuber-osity of the humerus. I have reasons to believe that subacromial bursitis isneither infectious nor toxic in origin. In all of the eighteen patients I have operated on, I foundthe same lesion in the bursa—adhesions between its twowalls. 18 274 THE JOURNAL OP ROENTGENOLOGY The lime deposit is not in the bursa, or in its walls. Itlies under the bursa, either wholly within the supraspinatustendon, or on it, or partly within and partly on it. Thetendon may have to be split to reveal the deposit or depos-its, or the calcareous mass may be plainly seen lying in thetendon. Occasionally the deposit is in the infraspinatustendon. Sometime it will be found scattered about on theperiosteum in the neighborhood of the greater tuberosity. The lime deposit takes place, not slowly but very speed-ily after the injury. The symptoms of subdeltoid bursitis are two: Pain anddisability in shoulder movements. The pain sometimesradiates into the forearm, and hand, the fingers or the His treatment consists of putting the patient to bed, sup-ported on several pillows and with his arm raised as far ashe comfortably can abduct it. A towel or bandage sling ispassed from the waist or elbow to the head of the bed, andthis end of the bed is raised on blocks or chairs. It will KNERR — CASE REPORTS 275 often be noted that as soon as the patient is comfortablyrecumbent he can abduct his arm more than when he gradually slides down in bed his arm correspondinglygoes up; and it is no rare experience in a patient who hasnot abducted his arm more than 45 degrees in many monthsto find it thus fully and painlessly abducted in twenty-fourhours. Codein and acetyl-salicylic acid are helpful aids in over-coming the pain the first clay or two. If this treatment doesnot cure he advises operation. C. H. B. NEW APPARATUS A method of mounting dental films which I find to beentirely successful is shown in the accompanying photo-graph. At each corner
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