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Anonychia is the failure to form fingernails or toenails. [ 1 ] It is an anomaly which may be the result of a congenital ectodermal defect, ichthyosis , severe infection, severe allergic contact dermatitis , self-inflicted trauma , Raynaud phenomenon , lichen planus , epidermolysis bullosa , or severe exfoliative diseases.
The lack of development or complete absence of fingernails results from the loss of function mutations in the LMX1B gene. This mutation may cause a reduction in dorsalising signals, which then results in the failure to normally develop dorsal specific structures such as nails and patellae. [10]
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.
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 ...
Nail abnormalities in ED often manifest as dysplastic or poorly formed nails. Affected individuals may have thin, brittle, or ridged nails that are prone to splitting and breaking. In severe cases, nails may be entirely absent or exhibit atypical growth patterns, including spoon-like (koilonychia) or thickened (pachyonychia) appearances. [1] [2]
Are your fingernails yellow, brown, black, or another color? Doctors explain the different causes of nail discoloration, and what to do in each case. ... Doctors explain the different causes of ...
Coffin–Siris syndrome (CSS), first described in 1970 by Dr Grange S. Coffin and Dr E. Siris, [1] [2] is a rare genetic disorder that causes developmental delays and absent fifth finger and toe nails. There had been 31 reported cases by 1991. [3] The number of occurrences since then has grown and is now reported to be around 200. [4]
3. Depending on your nail strength, acrylics may cause a splitting or painful nail plate. Pay close attention to how strong and think your nails are. Extremely thin nails may not be the best for ...