Histopathologic examination of the biopsy specimen revealed an epidermis with mild hyperplasia and mild hyperkeratosis. Several infundibulocystic structures with surrounding well-developed, mature sebaceous lobules emanating from some of the cyst walls were evident in the dermal stroma. The cystic structures were lined by stratified squamous epithelium with ortholemmal keratinization. Vascularized fibrous stroma surrounding the structures was also seen. The patient was referred for surgical resection.
Multinodular Plaque in a Young Adult—Diagnosis. Arch Dermatol. 2005;141(8):1035-1040. doi:10.1001/archderm.141.8.1035-g