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The lunula (pl.: lunulae; from Latin 'little moon') is the crescent-shaped whitish area of the bed of a fingernail or toenail. In humans, it appears by week 14 [ 1 ] of gestation , and has a primary structural role in defining the free edge of the distal nail plate (the part of the nail that grows outward).
Half and half nails (also known as "Lindsay's nails") show the proximal portion of the nail white and the distal half red, pink, or brown, with a sharp line of demarcation between the two halves. [ 1 ] : 785 The darker distal discoloration does not fade on pressure, [ 2 ] which differentiates Lindsay's nails from Terry's nails .
Terry's nails is a physical condition in which a person's fingernails or toenails [1]: 659 appear white with a characteristic "ground glass" appearance without any lunula. [2]
Congenital onychodysplasia of the index fingers is defined by the presence of the condition at birth, either unilateral or bilateral index finger involvement, variable distortion of the nail or lunula, and polyonychia, micronychia, anonychia, hemi-onychogryphosis, or malalignment. [1]
Cooks syndrome is a hereditary disorder which is characterized in the hands by bilateral nail hypoplasia on the thumb, index finger, and middle finger, absence of fingernails on the ring finger and little finger, lengthening of the thumbs, and bulbousness of the fingers.
According to Medical News Today, nail clubbing occurs in 5%-15% of people with lung cancer, though it can develop due to a variety of other conditions, including severe cases of chronic ...
12. Consider taking biotin supplements. While biotin supplements haven’t been proven to aid in hair and nail growth, there are anecdotal reports that they may help to strengthen the nail plate ...
Onychorrhexis also known as brittle nails, is brittleness with breakage of fingernails or toenails. Paronychia is a bacterial or fungal infection where the nail and skin meet. Koilonychia is when the nail curves upwards (becomes spoon-shaped) due to an iron deficiency. The normal process of change is: brittle nails, straight nails, spoon-shaped ...