A Case of Phyllodes Tumor Combined with Lobular Carcinoma of the Breast with Microinvasion

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  • 微小浸潤を伴う乳腺小葉癌が併存した葉状腫瘍の1例
  • ビショウ シンジュン オ トモナウ ニュウセン ショウヨウガン ガ ヘイソン シタ ヨウジョウ シュヨウ ノ 1レイ

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<p>A 51-year-old woman who had been followed up for a 2 cm-sized left breast tumor with calcification diagnosed as ductal adenoma by a core needle biopsy 3.5 years earlier revisited due to bloody nipple discharge of the left breast. Ultrasonography showed the tumor to have grown up to 4 cm in size. A vacuum assisted biopsy was performed and the pathological examination revealed fibroepithelial lesion with hyperplastic epithelial components.</p><p>A left partial mastectomy was done due to a growing tendency of the tumor and for ruling out malignancy. Pathological examination demonstrated that phyllodes tumor with hyperplastic epithelial component proliferated in the lactiferous ducts and lobular carcinoma in situ with 0.5 mm-sized microinvasion was observed in places.</p><p>Though there were several previous reports about co-existence of breast carcinoma and phyllodes tumor, almost of them were combined with ductal carcinoma. Herein we report this very rare case of phyllodes tumor combined with lobular carcinoma of the breast with review of the previous reports.</p>

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