Plummer's nail

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Onycholysis as a sign of hyperthyroidism, especially when it affects the ring finger.

Description

Onycholysis as a sign of hyperthyroidism, especially when it affects the ring finger. Concave or ragged edge to the nail bed seen in early onycholysis occurring with thyrotoxicosis (basedow's disease) usually most prominent in the 4th and 5th fingers.

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