A Case of a Giant Breast Phyllodes Tumor 13 cm in Diameter in a 17-year-old Woman

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  • 17歳女性にみられた乳腺葉状腫瘍（径13cm）の1例
  • 症例 17歳女性にみられた乳腺葉状腫瘍(径13cm)の1例
  • ショウレイ 17サイ ジョセイ ニ ミラレタ ニュウセン ヨウジョウ シュヨウ(ケイ 13cm)ノ 1レイ

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Abstract

<p>The frequency of mammary phyllodes tumors is less than 0.5% of all mammary tumors and the tumors most commonly affect women in their forties and very uncommonly affect teens. We experienced a surgical case of a rapidly growing juvenile-onset giant phyllodes tumor. Case : A 17-year-old woman had noticed a lump in her left breast from April 2015. It rapidly grew, prompting her to make her first visit to our department in July of the same year. On physical examination, a 13-cm smooth elastic soft tumor was found, principally located in the B region from the border of the lower left breast. Contrast enhanced CT findings revealed a 13.5 × 8.5 cm huge lump in the ABD region of her left breast, with clear boundaries and edge alignment, which was relatively uniformly and lightly contrasted. A needle biopsy revealed fibroadenoma. However, the tumor was large with the possibility of it being a phyllodes tumor, so a tumor resection was performed with a margin of 1.5 cm. The left lower mammary sulcus was dissected and thus no postoperative breast deformation was observed. The postoperative pathological results yielded a diagnosis of benign phyllodes tumor and there has been no recurrence as of 4 years following the surgery. Conclusion : Fibroadenomas and phyllodes tumors may be difficult to distinguish ; however, esthetic care, preservation of future lactation function, and mental aspects, in addition to completely curing the tumor, must be taken into consideration when treating young women.</p>

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