Mannerfelt Sign

Other Names

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Mannerfelt Sign

Positive mannerfelt sign on the left in a patient with AIN syndrome

Positive mannerfelt sign in a patient with FPL rupture

Positive mannerfelt and froment sign in a patient with ulnar nerve paralysis

• Mannerfelt Sign
• Mannerfelt’s sign
• Mannerfelt test
• Mannerfelt’s test
• Thumb interphalangeal flexion test
• Flexor pollicis longus rupture sign
• Flexor pollicis longus (FPL) rupture test
• Rheumatoid thumb flexion sign
• Thumb IP flexion loss sign

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Purpose

• Evaluate the integrity of Flexor Pollicis Longus as a cause of thumb weakness
• Less commonly, to evaluate the integrity Anterior Interosseous Nerve as part of the patients hand weakness

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Description

• Ask the patient to flex the thumb
• Observe motion at the IP joint
• Positive sign
  • Inability or marked weakness in thumb IP flexion
  • Passive IP motion remains intact

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Pathology

• Mannerfelt Syndrome
• Rheumatoid Arthritis
• Anterior Interosseous Nerve Syndrome

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Evidence

• Unknown

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See Also

• Hand Pain Main
• Neuropathies Main
• Physical Exam Hand
• Hand Anatomy Main

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