An interesting case of a condition called arthritis mutilans!
Arthritis mutilans is a rare form of inflammatory arthritis that causes severe inflammation. This leads to the wearing down of joints and bone tissues in the hands and feet. It occurs mainly in people who have pre-existing psoriatic arthritis or advanced rheumatoid arthritis, but it can also occur independently. In arthritis mutilans, a patient's fingers become shortened by arthritis, and the shortening may become severe enough that the hand looks paw-like, with the first deformity occurring at the interphalangeal and metacarpophalangeal joints. The excess skin from the shortening of the phalanx bones becomes folded transversely, as if retracted into one another like opera glasses. As the condition worsens, luxation, phalangeal and metacarpal bone absorption, and skeletal architecture loss in the fingers occurs. Credit: researchgate.com