Subcutaneous Dupuytren cordotomy. A, Well-defined pretendinous cord in ring finger with a 60-degree MP joint contracture. B, No. 15 scalpel blade inserted between skin and pretendinous cord. C, Forceful extension effectively delivers more superficially abnormal cord onto scalpel blade held at 90 degrees to tight cord. D, Resultant MP joint extension achieved. SEE TECHNIQUE 75.2.