Flexion fingers

Introduction Flexion refers to the change of flexion deformity of the finger. The flexion of the finger often has a family history. It begins to be inconspicuous and gradually increases in flexion, often accompanied by other systemic syndromes such as Doun syndrome.

Cause

The cause of the deformity is unclear, mostly due to irregular starting point of the superficial muscle.

an examination

Related inspection

Blood routine CT examination

The main manifestation is the shortening of the flexor digitorum, the cause of the deformity is unclear, and it is caused by the irregular origin of the superficial muscle, which can be caused by the superficial or sacral muscles of the flexor ring. Often accompanied by skin shortening, the finger extension function will also be limited.

The malformation features are:

1. The flexion deformity often occurs in the little finger, occasionally involving the ring finger, and more than half is bilateral.

2. Buckling often occurs in the proximal interphalangeal joint, accompanied by metacarpophalangeal joints or wrist-facing extensional extension.

3. Before the age of 10, the flexion of the fingers occurred progressively, often with a family history, which was not obvious at first, and gradually increased and was emphasized by the parents.

4. Often accompanied by other systemic syndromes such as doun syndrome, klinefelfer syndrome, several common facial syndromes, accompanied by skew deformity.

5. The main manifestation is the shortening of the flexor digitorum, the cause of the deformity is unclear, mostly due to the irregular origin of the superficial muscle, which can be caused by the flexor digitorum or the sacral muscle. Often accompanied by skin shortening, the finger extension function will also be limited.

Differential diagnosis

Fingers can not flex and stretch: Finger flexor tenosynovitis can cause fingers to bend and stretch. Mainly manifested as limited pain in the volar side of the metacarpophalangeal joint and restricted finger movement. As the stenosis of the tendon sheath is aggravated and the tendon is swollen after the tendon is compressed, most of the swelling will be difficult or impossible to slide through the narrow tendon sheath, and the finger stays in the extension or flexion position, and the interlocking phenomenon occurs.

The interphalangeal joint cannot be flexed: the symptom of the extensor tendon injury is that the interphalangeal joint cannot flex.

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