A M Al-Ghamdi1, M J Trotter. 1. Department of Pathology, Vancouver Hospital and Health Sciences Centre, University of British Columbia, Vancouver, British Columbia, Canada.
Abstract
BACKGROUND: Epithelial elements, such as trichoepithelioma, are occasionally associated with melanocytic nevi. OBJECTIVE: A case of trichoepithelioma in association with cellular blue nevus is reported. METHODS AND RESULTS: A solitary, pigmented nodule was removed from the scalp of a middle-aged woman. Histopathologic examination demonstrated a circumscribed cellular blue nevus within which were embedded epithelial strands and cystic structures consistent with trichoepithelioma. CONCLUSION: Trichoepitheliomas have been described in relation to common acquired nevi, but an association with a blue nevus is rare. The intimate admixture of trichoepithelioma within the nodule of a nevus supports the concept of epithelial induction by melanocytic nevi.
BACKGROUND: Epithelial elements, such as trichoepithelioma, are occasionally associated with melanocytic nevi. OBJECTIVE: A case of trichoepithelioma in association with cellular blue nevus is reported. METHODS AND RESULTS: A solitary, pigmented nodule was removed from the scalp of a middle-aged woman. Histopathologic examination demonstrated a circumscribed cellular blue nevus within which were embedded epithelial strands and cystic structures consistent with trichoepithelioma. CONCLUSION:Trichoepitheliomas have been described in relation to common acquired nevi, but an association with a blue nevus is rare. The intimate admixture of trichoepithelioma within the nodule of a nevus supports the concept of epithelial induction by melanocytic nevi.