An old man suffers from gout for a long time with his tophus [stone] lump on the right hand but now that makes pain and he could not move the second finger. EULAR GOUT SCORE # 15 >8.0
X-ray and MRI show the erosions of the metacarpal and second phalanx bones close the tophus lump.
And a 33MHz ultrasound probe notes the tophus lump in hand in more details.
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