Invasive and Non-invasive Ductal Carcinoma within Malignant Phyllodes Tumour with Axillary Lymph Node Metastases

Phyllodes tumours are uncommon breast neoplasms constituting 1-2% of breast malignancies. Metastasis is usually haematogenous, and axillary lymph node dissection is not routinely performed. A phyllodes tumour with concomitant invasive ductal carcinoma (IDC) is even rarer. When IDCor ductal carcinoma in-situ (DCIS) is detected, the management of the condition changes completely. We report a case of a 22-year female presenting with a mass in the right breast and palpable axillary lymph nodes. The pathological examination demonstrated a malignant phyllodes tumour with concomitant IDC and DCIS. The patient elected to have modified radical mastectomy, and the pathological examination showed metastasis in the axillary lymph nodes. The patient was administered appropriate therapy. At the last visit, she did not have the clinical signs of disease. This is the first youngest case of axillary lymph node metastases with both DCIS and IDC on pathological examination in malignant phyllodes tumour.