1. Calcification in a lesion does not necessarily mean satisfactory healing.
2. Clearing or reestablishment of bony detail is a much better indication of healing.
3. Bony fusion or bony block is a favorable sign.
4. Decrease in the size of an abscess is a favorable sign, while increase in the size of an abscess is decidedly an unfavorable sign.
5. Paravertebral abscesses accompanying dorsal Pott's disease are dangerous in that they cause a much wider destruction than the original lesion. A mechanical pulsating force must play a part in their production.
6. It is suggested that early eradication of such abscesses might be attempted, but the danger of establishing a permanent sinus is serious.
(C) 1928 All Rights Reserved.The Journal of Bone and Joint Surgery, Inc.