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"Apocrine" poroma: review of the literature and case report
H Kamiya1, Z Oyama, Y Kitajima
1Department of Dermatology, Gifu University School of Medicine, Japan. kamihide@cc.gifu-u.ac.jp
Background:
"Apocrine" poroma has recently been proposed as a new term to designate a distinctive benign skin neoplasm with differentiation toward the folliculosebaceous-apocrine unit.
Case Report:
In support of alternative differentiation, a case of apocrine poroma is reported in a 73-year-old man. A nodule on the right upper abdomen, which was thought clinically to be seborrheic keratosis or basal cell epithelioma, was excised.
Histology:
Histologically, this neoplasm heterogeniously consisted of poroma-like, sebaceous and follicular epithelial components. Since these components share the common embryologic origin of the folliculosebaceous-apocrine unit, this histologic pattern indicates apocrine differentiation of the tumor.
Conclusion:
This is an additional case to support the term "apocrine" poroma as a diagnosis.