In addition the first metacarpal bone moves ulnarward, swinging in that direction from a pivot at the carpometacarpal joint. In circumduction the thumb swings in a circle with the ...

Within this classification scheme, isolated distal interphalangeal (DIP) joint involvement and arthritis mutilans, while both unusual, are the most specific joint findings indicating PsA.

Thumb arthritis is becoming a growing concern among younger adults, as they experience joint breakdowns at ages not seen in previous generations. This condition has been linked to the extensive ...