Answer :

Final answer:

Boutonniere deformity is associated with rheumatoid arthritis and is characterized by the flexion of the proximal interphalangeal joint and extension of the distal interphalangeal joint. It can also result from trauma. Early treatment is vital for managing symptoms.

Explanation:

Boutonniere deformity is a physical condition typically associated with patients who have rheumatoid arthritis. This deformity involves the flexion of the proximal interphalangeal joint (the middle joint of a finger) and extension of the distal interphalangeal joint (the joint closest to the fingertip). This results in the finger adopting a characteristic 'buttonhole' or 'boutonniere' posture.

In rheumatoid arthritis, the inflammation and damage to the tendons around the joints lead to this deformity. However, it can also result from trauma or other conditions affecting the tendons or joints of the finger. Early treatment and physical therapy can help manage the symptoms and prevent further joint damage.

Understanding the underlying cause is crucial for effective management. For instance, in the case of rheumatoid arthritis, controlling the overall disease activity is a key part of treatment, alongside specific therapies aimed at maintaining finger mobility.