139 citations
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October 2005 in “Journal of Investigative Dermatology” The nail matrix has a reduced immune response, protecting it from autoimmunity.
13 citations
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April 2009 in “Journal der Deutschen Dermatologischen Gesellschaft” Nail disorders not caused by infection are common and can look similar, with psoriasis being the most frequent and having specific nail symptoms.
The nail immune system is similar to hair but different from skin, with fewer immune markers.
2 citations
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February 2021 in “PubMed” Koilonychia in alopecia areata can improve with oral corticosteroids.
21 citations
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January 2005 in “Skinmed” Hair and nails are similar keratin structures with different shapes and growth, affected by the same diseases and environmental factors.