What Is Koilonychia?
Koilonychia is a feature of an iron  deficiency state characterized by abnormally shaped nails, called spoon shaped nails, meaning that the normal downward curve is reversed.
Depending on the inadequacy of iron , nails may simply remain flat or with a slight dip without progressing to a reversed curve.
These nails develop vertical ridges from the base to the nail tip that can become deep, called washboard nails.
Q: Are all nails affected?
A: All nails are affected in varying degrees. The small finger shows the least effect while the thumb shows the greatest change which begins as flattening before scooping upward.
Nail Anatomy. .
A. Nail plate; B. lunula; C. root; D. sinus; E. matrix; F. nail bed; G. hyponychium; H. free margin. Courtesy Wikipedia.
What Is Koilonychia In Celiac Disease and/or Gluten Sensitivity?
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