Abstract
Poroma is a benign adnexal neoplasm with atn “poroid”/ductal differentiation that mimics benign and malignant skin tumors. Histopathology shows circumscribed proliferation of poroid cells intermingled with a variable number of cuticular cells. We report a case of pigmented poroma located on the face that simulated clinically and dermatoscopically a pigmented basal cell carcinoma. The features of pigmented and non-pigmented poromas were revisited in order to assist in the diagnosis.
Highlights
Dermatoscopy revealed some structures resembling brownish ovoid nests indicating the possibility of basal cell carcinoma (BCC) (Figure 2)
The lesion was completely excised and histopathology depicted a pigmented poroma (PP) characterized by epithelial aggregates of poroid and cuticular cells connected to the epidermis and extending into the dermis
Poroma was first described by Goldman et al in 1956 as a benign neoplasm originating from the sweat gland, made up of epithelial cells with eccrine differentiation [1]
Summary
Luiza E. B. P. Kassuga, M.D.1, Thiago Jeunon, M.D.2,3, Maria Auxiliadora Jeunon Sousa, M.D.2, Gabriella Campos-do-Carmo, M.D.4,5 Key words: poroma, dermatoscopy, basal cell carcinoma, histopathology, pigmentation Citation: Kassuga, LEBP, Jeunon T, Jeunon Sousa MA, Campos-do-Carmo G. Pigmented poroma with unsusual locatin and dermatoscopic features. Dermatol Pract Conc. 2012;2(3):7. http://dx.doi.org/10.5826/dpc.0203a07. History: Received: January 12, 2012; Accepted: March 31, 2012; Published: July 31, 2012 Funding: None. Competing interests: The authors have no conflicts of interest to disclose. All authors have contributed significantly to this publication.
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