A 31-year-old woman has a brown line on her fingernails 3 mo | Figure 1
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A 31-year-old woman has a brown line on her fingernails 3 months ago. My diagnosis was vitamin A deficiency ... what do you think about it?
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Fingernails - 31 yo male noticed white lines starting to grow out a few weeks ago. No hx of trauma to the nails. Other hand has similar appearance. No significant past med hx, not on any meds.
Koilonychia
Any thoughts on what would cause this black line? Right through nail bed. Patient states has been there for about 10 years. No trauma to nail. Unchanged in as many years. Weak spot in nail, causing nail to split.
How is this sign called? What would you tell the patient about etiology and prognosis?
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