• Source: Anonychia

Anonychia is the failure to form fingernails or toenails.
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.




Cause


This is rare and is usually due to mutations in the R-spondin 4 (RSPO4) gene which is located on the short arm of chromosome 20 (20p13).




See also


List of cutaneous conditions




References






External links

Kata Kunci Pencarian:

• Anonychia
• Anonychia (moth)
• List of diseases (A)
• Cooks syndrome
• Anonychia-onychodystrophy with brachydactyly type B and ectrodactyly
• Microcephaly
• List of diseases (B)
• List of skin conditions
• Pueraria montana
• Triphalangeal thumbs-brachyectrodactyly syndrome