An old man suffers from gout for a long time with his tophus [stone] lump on the hand but now it makes pain and could not move the second digits.
X-ray and MRI show the erosion of the bone close the tophus.
Joint deformity and limitation of motion in affected joint may occur if several attacks of gout occur each year. Uric acid deposits called tophi develop in cartilage tissue, tendons, and soft tissues. These tophi usually develop only after a patient has suffered from the disease for many years. Deposits also can occur in the kidneys, leading to chronic renal failure.
https://medlineplus.gov/ency/imagepages/19833.htm
REFERENCES:
https://goutclassificationcalculator.auckland.ac.nz/
https://pmc.ncbi.nlm.nih.gov/articles/PMC11348250/n
https://radiopaedia.org/articles/gout
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