What condition results in a limitation of finger extension predominantly affecting the 4th and 5th fingers?

The condition that results in a limitation of finger extension, particularly affecting the 4th and 5th fingers, is Dupuytren's contracture. This condition is characterized by the thickening and shortening of the palmar fascia, which can lead to the fingers being pulled inwards towards the palm. Over time, this contraction primarily impacts the little finger (5th) and the ring finger (4th), causing a significant impairment in their extension.

In Dupuytren's contracture, the normal extension of these fingers is compromised due to the tightness of the fascia, limiting the ability to fully straighten them. Early signs may include nodules or cords in the palm that eventually strain the tendons, resulting in the characteristic curled fingers. Thus, the emphasis on the fourth and fifth fingers aligns with the common presentation of this condition.

The other conditions listed have distinct characteristics and do not predominantly affect the extension of these particular fingers as seen in Dupuytren's contracture. Trigger finger involves the locking or catching of a finger during movement due to tendon issues, Jersey finger entails an inability to flex the finger, particularly involving the ring finger at the distal joint, and Swan neck deformity typically affects the finger's positioning without specifically limiting extension in the