J Breast Cancer.  2011 Jun;14(2):153-155. 10.4048/jbc.2011.14.2.153.

Ectopic Hidradenoma Papilliferum of the Breast: Ultrasound Finding

• Kim YJ
• Lee JW
• Choi SJ
• Kim SJ
• Kim YJ
• Jeon YS
• Lee KH

• KMID: 2286516
• DOI: http://doi.org/10.4048/jbc.2011.14.2.153

Abstract

Hidradenoma papilliferum (HP) is a benign neoplasm arising from mammary-like glands which typically involves the dermal layer of the female anogenital area. The prognosis for HP is good. Recurrence is unusual and is typically attributed to incomplete excision of the primary tumor. Malignant transformation is rare and HP of the breast has not yet been reported. Ectopic HP is usually solitary, small, and asymptomatic. It appears as a well-circumscribed, complex cystic mass in the dermis on ultrasound. We present a case of HP arising from the axillary tail of the breast.

Keyword

Breast; Benign neoplasms; Hidradenoma

MeSH Terms

Acrospiroma
Breast
Dermis
Female
Humans
Prognosis
Recurrence

Figure

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  Figure 1 Ultrasound shows three, round complex masses in the dermis which abutted the subcutaneous fat layer of the left breast.

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  Figure 2 Excisied specimen shows two well circumscribed solid and partly cystic masses.

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  Figure 3 Microscopic findings of the lesions (A, H&E stain, ×1; B, H&E stain, ×200). The lesions are composed of proliferation of papillary fronds made of loose fibrous connective tissue lined by pseudostratified bland-looking epithelial cells. These findings are consistent with the cystic papillary tumors.

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