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Ectopic hidradenoma
papilliferum: a case report and review of the literature.J
Am Acad Dermatol. 1999 Jul;41 (1):115-8.
Hidradenoma
papilliferum is a benign, cystic, papillary tumor that occurs almost
exclusively in women on the skin of the anogenital region.
Nonanogenital (ectopic) hidradenoma papilliferum are rare. We describe
a 72-year-old white man with an enlarging nodule in the region of the
right triceps muscle; microscopic examination showed a hidradenoma
papilliferum. The median age of patients with ectopic hidradenoma
papilliferum is between 1 to 2 decades older than the average age
range of lesion onset in patients with anogenital hidradenoma
papilliferum. In contrast to anogenital hidradenoma papilliferum,
nearly one half of the patients with ectopic hidradenoma papilliferum
are men. Ectopic hidradenoma papilliferum occurs most frequently (60%)
in the head and neck region. Eighty-five percent of cases are 1.5 cm
in the greatest diameter or smaller. The race, clinical features,
pathologic features, treatment, and prognosis for hidradenoma
papilliferum occurring in anogenital and ectopic locations are
similar.
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