DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Gout causing swelling in the last (distal) joint of a 79-year-old woman's finger. Gout is a metabolic disoder where an accumulation of uric acid and its salts causes painful deposits to form in the blood and joints. Treatment is of the pain, and then of the underlying cause, often dietary.
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