Progression and clinical implications of boutonniere deformity

The Boutonniere Deformity, characterized by PIP flexion and DIP hyperextension, results from central slip damage. Initial central slip lesion progresses to involve other structures, causing volar migration of lateral bands. Elson's test aids diagnosis by isolating central slip function. Conservative treatment involves immobilization followed by mobilization. Understanding the complex mechanics is crucial for accurate diagnosis and effective management.