Özet:

M etaplastic carcinoma is a rare type of breast cancer and accounts for less than 1% of all invasive breast cancers. In this report, we aimed to present the ultrasonographic and Doppler ultrasonographic findings of metaplastic carcinoma of the breast which is an aggressive type of breast cancer with worse prognosis than classical breast carcinomas.A 40-year-old female patient presented with a palpable mass in her right breast. Breast ultrasound revealed a heterogeneous hypoechoic, round-shaped, microlobulated mass of 23 x 20 mm of dimensions in the lower inner quadrant of the right breast and also edema of the adjacent parenchyma. We found relative high resistive index”of the feeding arteries (RI: 0.62) in doppler examination of the mass. The lesion was reported as BI-RADS 4 category and excisional biopsy was recommended. Histopathological examination revealed metaplastic carcinoma of the breast. Tumour cells were positive for progesterone receptor (70% positive) and c-erb-B2 (30% positive). Metaplastic carcinoma of the breast, which is an aggressive type of breast cancer with worse prognosis than classical breast carcinomas should be included in the differential diagnosis of breast tumors, even in evaluating lesions with benign sonographic and mammographic features.

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