Metaplastic carcinoma of the breast is a rare form of breast cancer and has a poorer prognosis than other breast malignancies. Preoperative diagnosis of this tumor by imaging is difficult because of its rarity. Sonography of this small neoplasm has not been reported previously. We describe a case of this rare tumor together with the preoperative mammographic and sonographic findings. When these images present in a lesion, metaplastic breast carcinoma should be included in the differential diagnosis.
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Ng et al. (2003) studied this question.
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