Hemangiopericytoma of the Breast: A Case Report

BACKGROUND: Hemangiopericytoma (HPC) is a rare vascular tumor originating from the capillary pericytes, and HPC of the breast is extremely rare. CASE REPORT: We describe a 50-year-old woman with HPC of the breast and focus on the diagnosis before operation and the extent of the operation. Under local anesthesia, a complete tumor excision was performed. Then, the fast-frozen material was pathologically examined and the diagnostic conclusion was 'malignant tumor of the breast, perhaps original from lobus intermedius tissue'. Finally, a modified radical mastectomy was performed, after which all 7 lymph nodes from the axillary fossa position of the excision showed symptoms of reactive hyperplasia. CONCLUSION: ON THE BASIS OF REVIEWING THE LITERATURE ABOUT THE DISEASE, WE PROPOSE SEVERAL BASIC IDEAS: an accurate biopsy together with an appropriate histological and im-munohistochemical examination is promising, and since lymph node metastasis is extremely rare, a simple mastectomy may be considered.