Pediatric Keratosis Pilaris Workup

Updated: May 10, 2022
  • Author: Derek H Chu, MD; Chief Editor: Dirk M Elston, MD  more...
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Laboratory Studies

There are no laboratory tests for keratosis pilaris. Keratosis pilaris is clinically diagnosed by the appearance and distribution of the skin lesions.


Histologic Findings

The epidermis demonstrates a fine lamellar follicular plug arranged concentrically around a normal hair shaft. The plug extends to the level of the hair follicle, and one or more rudimentary hairs may also be present. Mild hyperkeratosis and hypogranulosis may also be noted. [15]