Cavernous hemangioma of the breast: mammographic and sonographic findings and follow-up in a patient receiving hormone-replacement therapy.

We report the case of a 78-year-old woman who had been receiving hormone-replacement therapy (HRT) for 6 years and had a 4-month history of a painless nodule in the 9 o'clock position in her right breast. Mammography performed 4 years previously had shown a 4-mm bilobed, ovoid, well-defined nodule in that location; mammography performed 1 year previously had shown that the nodule had increased to 6 mm. We performed mammographic and sonographic examinations, which revealed a 10-mm ovoid nodule in the same 9 o'clock position in the right breast. The imaging findings appeared to indicate benignity, but because of the increasing size of the nodule, we undertook an ultrasound-guided large-core needle biopsy. The histopathologic diagnosis was typical cavernous hemangioma. It was not excised, but HRT was discontinued. Follow-up mammography and sonography 8 months later showed that the nodule had decreased to 6 mm. We believe that the HRT played a contributory role in the increasing size of this patient's cavernous hemangioma. The use of ultrasound-guided large-core needle biopsy is reliable enough to ascertain the benignity of such masses and can thus avoid, if it is clinically appropriate, the need for their surgical removal.