A case of spindle cell lipoma of the breast found on mammography in a 53-year-old woman is presented. This rare type of tumor has been previously reported on only after its presentation as a palpable mass. Radiographically it appears as a well-circumscribed mass. Ultrasonographically it appears as a homogeneously hyperechoic nodule. Histologically these lesions are composed of spindle cells intermingled with adipocytes.
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