Heberden's nodes are seen in:: (A) Osteoahritis of the Distal interphalangeal joints, (B) Osteoahritis of the Proximal interphalangeal joints, (C) Rheumatoid ahritis of the 1st carpometacarpal joint, (D) Rheumatoid ahritis of the Distal interphalangeal joints
Answer is A. Osteoahritis characteristically involves distal interphalangeal joint (Heberden's node), proximal interphalangeal joint (Bouchard's node), 1st carpometacarpal joint (base of thumb) of hand with sparing of metacarpophalangeal joint and wrist joint.