Simultaneous bilateral invasive breast cancer with coexisting benign phyllodes tumor and lymph node metastasis

Cases of coincidental phyllodes tumor (PT) of the breast and invasive breast cancer are extremely rare. This case report describes a 58-year-old women with simultaneous bilateral invasive breast cancer. On the left side, the carcinoma was associated with the epithelial component of a PT and presented with lymph node metastasis. To the best of the present authors’ knowledge, this is the first report of a PT with simultaneous bilateral breast cancer and equilateral lymph node metastasis. Moreover, associated axillary lymph node metastasis with an invasive ductal carcinoma (IDC) arising from the epithelial component of a PT is extremely rare. In the absence of standardized treatment option, therapy recommendations should be tailored individually upon clinical presentation.

Phyllodes tumor; Breast tumor; Bilateral invasive ductal cancer; Collision tumor; Lymph node metastasis

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