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Review Question - QID 6095

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QID 6095 (Type "6095" in App Search)
In obstetrical brachial plexus palsy, which of the following signs is associated with the poorest prognosis for recovery in a 2-month-old infant?

Persistent inability to bring the hand to the mouth with the elbow stabilized at the side

20%

149/749

Persistent inability to actively abduct the arm past 90 degrees

5%

34/749

Persistent inability to externally rotate the shoulder past 20 degrees

2%

17/749

Persistent unilateral ptosis, myosis, and anhydrosis

71%

533/749

History of clavicle fracture at birth

1%

9/749

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Persistent Horner’s sign (ptosis, myosis, and anhydrosis) is a sign of proximal injury, usually avulsion of the roots from the cord which disrupts the sympathetic chain. Root rupture or avulsion proximal to the myelin sheath has less chance of healing. Two-month-old infants with persistent weakness in the other areas described may still have a good prognosis for recovery. Concurrent clavicle fracture has been shown to have no prognostic value.

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