Abnormal enlargement and rounding of the fingertips and nails, creating a club-like appearance. It typically indicates chronic low oxygen levels or lung disease, though it can occur in heart and liver conditions.
Named for the resemblance of affected fingers to clubs, the term entered medical usage in the 19th century. Hippocrates first described the condition in association with lung disease, giving rise to the alternate name 'Hippocratic fingers.'
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