Marfan Syndrome (Thumb Sign)
The thumb protrudes beyond the edge of the clenched fist in this photo of a person with Marfan syndrome.
MEDICAL PHOTO NHS LOTHIAN/SCIENCE PHOTO LIBRARY
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The thumb protrudes beyond the edge of the clenched fist in this photo of a person with Marfan syndrome.
MEDICAL PHOTO NHS LOTHIAN/SCIENCE PHOTO LIBRARY