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While Beau's lines are actual ridges and indentations in the nail plate, Muehrcke lines are areas of hypopigmentation without palpable ridges; they affect the underlying nail bed, and not the nail itself. Beau's lines should also be distinguished from Mees' lines of the fingernails, which are areas of discoloration in the nail plate.
“Ridges can be longitudinal (vertical lines) traveling from the cuticle to the tips of your nail or transverse (horizontal lines) extending from one side to the other of your nail.” Photo ...
First, a crash course on what fingernail ridges even are: Vertical nail ridges (lines that run from your cuticle to the tip of your fingernail) are super-common, and are a normal sign of aging.
Muehrcke's lines were described by American physician Robert C. Muehrcke (1921–2003) in 1956. In a study published in BMJ, he examined patients with known chronic hypoalbuminemia and healthy volunteers, finding that the appearance of multiple transverse white lines was a highly specific marker for low serum albumin (no subject with the sign had SA over 2.2 g/dL), was associated with severity ...
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A nail is a protective plate characteristically found at the tip of the digits (fingers and toes) of all primates, corresponding to the claws in other tetrapod animals. Fingernails and toenails are made of a tough rigid protein called alpha-keratin, a polymer also found in the claws, hooves and horns of vertebrates. [1]
Trachyonychia is a condition characterized by rough accentuated linear ridges (longitudinal striations) on the nails of the fingers and toes. [3] When the condition occurs on all the twenty nails of the fingers and toes, it is known as twenty-nail dystrophy, most evident in childhood, [4] favoring males. [2] [5]
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