Steinberg sign (Marfan disease)

The Steinberg sign, also known as the thumb sign, is one of the clinical examination tests for Marfan disease in the hands. It is a clinical test in which the tip of the thumb is visible medial to the little finger when it is clasped in the clenched hand. 

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Article information

rID: 50242
Section: Signs
Synonyms or Alternate Spellings:
  • Thumb sign (Marfan's disease)

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