Lacy RM, Vega E, Domínguez L, Guevara E

Language: Spanish
References: 29
Page: 17-22
PDF size: 368.07 Kb.

ABSTRACT

Introduction. Poromas are described as benign, solitary adnexal tumors seen most frequently on palms and soles. Four histologic types have been described. The origin seems to be the pluripotential cells of the transitional zone between the dermic and intraepidermic segments of the eccrine sweat duct, although apocrine differentiation has also been considered.
Material and methods. A retrospective, transversal, descriptive and observational study on the eccrine poromas in a 25 years period was carried out in our Dermatology Department in order to know the epidemiology and the clinical and histological characteristics of this tumor. We also discuss the information reported in the literature.
Results. The 45 poromas found correspond to the 0.23% of the total of biopsies in our department. All of them were solitary tumors in patients from 10 to 83 years of age. Eccine poroma was the most common histologic type. Seventeen tumors shared characteristics of the other histologic types of poroma. Three lesions presented apocrine differentiation and one, follicular differentiation. We saw no recurrences after complete excision of the lesions.
Discussion. Poromas are uncommon tumors, more frequently found in women, in the middle age and on the legs. Poromas do not have specific clinical characteristics and other neoplasms have to be considered in the differential diagnosis. Eccrine poroma was the most frequently histological type found and can show apocrine and follicular differentiation. Porocarcinomas can grow from poromas. Complete excision in curative.

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