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"The longitudinal striations can occur as a normal part of the aging process", [2] and not until the nails start to thin and get a sandpaper look is the condition called trachonychia. The nails are opalescent and frequently are brittle and split at the free margin.
What do healthy nails look like? “Healthy nails should be smooth and without any ridges, bumps or dents,” says Dr. Soraya Azzawi , MD, FAAD, a board-certified dermatologist and health sciences ...
The cause is poorly understood due to a lack of research, but genome-wide scans indicate that it is a heritable trait, and could be autosomal dominant. [4] However, the wide variance in the size and structure of the accessory nail indicates that the trait may not follow a Mendelian pattern of inheritance, and may instead be a complex trait affected by multiple genes with minor genetic effects.
There are several causes of Beau's lines. It is believed that there is a temporary cessation of cell division in the nail matrix.This may be caused by an infection or problem in the nail fold, where the nail begins to form, or it may be caused by an injury to that area.
Leukonychia (or leuconychia) is a medical term for white discoloration appearing on nails. [2] It is derived from the Greek words leuko 'white' and onyx 'nail'. The most common cause is injury to the base of the nail (the matrix) where the nail is formed.
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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]
Severe congenital onychogryphosis affecting all twenty nailbeds has been recorded in two families who exhibit the dominant allele for a certain gene. [6] [7]Congenital onychogryphosis of the fifth toe (the baby, little, pinky or small toe) is fairly common, but asymptomatic and seldom brought to the attention of medical professionals.