1. Three cases of a degenerative type of rheumatoid arthritis, with large cystic cavities filled with pus-like material, are described. They may arise from bursae or breaking-down nodules.

2. Four cases in which necrosis and subluxation complicated rheumatoid disease of the cervical column are recorded.

3. The pathogenesis of necrotic and cystic areas in rheumatoid arthritis is discussed.