May be acute or chronic: Examples are: Acute articular rheumatism, rheumatoid arthritis, four types beginning with acute symptoms, one type having insidious onset. These are often due to unidentified foci.
Noninfectious Arthritis
A. Traumatic.
1. Acute, due to known traumatism.
2. Chronic, generally static in origin, or due to chronic strain or irritation. Possibly includes villous arthritis of the knee and hypertrophic arthritis in the young.
B. Trophic.
1. Metabolic. Examples are gout, psoriasis and probably hypertrophic arthritis.
2. Senile.
3. Neuropathic. Examples are tabes, leprosy, syringomyelia, Raynaud’s disease, and scleroderma.
4. Arteriosclerotic.