A Case of Fibroadenoma Arising in the Right Axillary Accessory Mammary Gland

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  • NAGASE Kotaro
    Division of Dermatology, Department of Internal Medicine, Faculty of Medicine, Saga University
  • SHIRAI Reiko
    Division of Dermatology, Department of Internal Medicine, Faculty of Medicine, Saga University
  • KOBA Shinichi
    Division of Dermatology, Department of Internal Medicine, Faculty of Medicine, Saga University
  • MISAGO Noriyuki
    Division of Dermatology, Department of Internal Medicine, Faculty of Medicine, Saga University
  • NARISAWA Yutaka
    Division of Dermatology, Department of Internal Medicine, Faculty of Medicine, Saga University

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Other Title
  • 右腋窩に生じた副乳由来乳腺線維腺腫の 1 例
  • 症例 右腋窩に生じた副乳由来乳腺線維腺腫の1例
  • ショウレイ ウエキカ ニ ショウジタ フクニュウユライ ニュウセン センイセン シュ ノ 1レイ

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Description

A 41-year-old woman presented with a 9-month history of subcutaneous mass in the right axilla. The mass gradually increased in size over time. Dermatological examination found a mobile, elastic-soft, well-demarcated subcutaneous mass measuring 3 cm in diameter in the right axilla. The lesion was excised. Histologic examination showed proliferation of connective tissue with an adenoma component of glandular ducts and surrounding accessory breast tissue, yielding a diagnosis of fibroadenoma arising in the axillary accessory mammary gland. Fibroadenoma arising in an axillary accessory mammary gland should be included in the differential diagnosis when an axillary tumor is found, even though it is a rare clinical entity.

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