Vascular tumors in adult female breasts, even if appearing benign on biopsy, have poor prognoses and should be treated as possible malignancies.
Rapid metastasis despite benign biopsy appearance in breast vascular tumor warrants caution; single case leaves management implications open.
A case of angiosarcoma of the breast during the period of pregnancy is reported. A 26-year-old female had noticed a left breast lump for 5 years. It started to grow from her second month of pregnancy. She underwent incisional breast biopsy at a near clinic, and the specimen was interpreted as benign hemangioma. The remaining tumor in her left breast rapidly enlarged after this biopsy. When she consulted our hospital after the delivery, the tumor had grown to 20×17cm in size. We suspected that the tumor was angiosarcoma and performed left radical mastectomy and right total glandectomy. She died of lung metastasis 5 months after the operation. As generally accepted, although the histological findings of biopsy materials are apparently benign, vascular tumors in adult female breasts have generally poor prognoses and should be treated as possible malignancies.
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Ishikawa et al. (1990) studied this question.
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