Anonychia

Please note that the content of this book primarily consists of articles
available from Wikipedia or other free sources online. Anonychia is the
absence of nails, a rare 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.