Answer :
Final answer:
The observation of PIP joint hyperextension and DIP joint flexion in an individual with arthritis is most likely documenting a correct option D. swan neck deformity, distinguished by the specific alignment of the finger joints.
Explanation:
When an occupational therapist (OT) observes PIP joint hyperextension and DIP joint flexion in the digits while evaluating an individual with arthritis, they are most likely documenting a classic presentation of correct option D. swan neck deformity. This condition is characterized by the proximal interphalangeal (PIP) joints exhibiting hyperextension, while the distal interphalangeal (DIP) joints show flexion. This specific alignment of the finger joints distinguishes swan neck deformity from other conditions such as boutonniere deformity, mallet finger deformity, and congenital deformities. Swan neck deformity is often seen in conditions like rheumatoid arthritis, emphasizing the importance of an accurate diagnosis for proper management and treatment.
