Trichilemmal cyst nevus: a new complex organoid epidermal nevus.

Tantcheva-Poor, Iliana; Reinhold, Katja; Krieg, Thomas; Happle, Rudolf · J Am Acad Dermatol · 2007

case_report · Level V

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Abstract

A 31-year-old woman had an organoid nevus characterized by multiple trichilemmal cysts arranged in a bandlike pattern. The involved streaks followed Blaschko's lines and were covered, in addition, by multiple filiform hyperkeratoses and comedo-like plugs. Some histopathologic features of this complex nevus were reminiscent of those of well-established organoid nevi such as nevus comedonicus, porokeratotic eccrine nevus, or hair follicle nevus, but the presence of multiple large trichilemmal cysts was a conspicuously distinctive abnormality. Consequently, we propose for this new organoid nevus the names "trichilemmal cyst nevus" or "nevus trichilemmocysticus."

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