Pseudoatrophoderma Colli Workup

Updated: Jun 01, 2022
  • Author: Anna Choczaj-Kukula, MD, PhD; Chief Editor: Dirk M Elston, MD  more...
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Histologic Findings

Histologic examination may be helpful to exclude the possibility of atrophic lichen planus, lichen sclerosus, poikiloderma, or porokeratosis of Mibelli.

The histologic findings in pseudoatrophoderma colli include hyperkeratosis of the epidermis with occasional parakeratosis and thinning of the granular layer, acanthosis of some areas with vacuolation and pyknosis of prickle cells, dilatation of superficial blood vessels, and minimal perivascular lymphocytic infiltration in the dermis. Fragmentation of the elastic tissue has also been described in some patients. Mild atrophy of the epidermis was noted only in single cases.