What is the role of lab testing in the diagnosis of keratosis pilaris (KP)?

Updated: Aug 12, 2019
  • Author: Ally N Alai, MD, FAAD; Chief Editor: Dirk M Elston, MD  more...
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Answer

No specific laboratory tests aid in the diagnosis of keratosis pilaris (KP). The diagnosis of keratosis pilaris is very straightforward and is based on a typical skin appearance in areas such as the upper arms. A family history of keratosis pilaris is also very helpful because keratosis pilaris has a strong genetic component. The diagnosis is confirmed on the basis of the physician’s clinical examination findings. A few other medical conditions look similar to keratosis pilaris, and these must be excluded.


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