[Phyllodes tumor of the breast: diagnostic and therapeutic problems].

Phyllodes tumour (PT) is a rare breast tumor with mixed connective and epithelial components, which usually relapses topically after excision. Five patients with PT took part in the study (4 were positive for benign PT and one was positive for malignant PT at extemporary histological examination). The patients (3) with 3 cm or minus benign lesion had mass excision with a large resection of the surrounding mammary tissue. In the remaining patient with benign neoplasm (8 cm lesion) simple mastectomy was carried out. Finally the patient with malignant PT (5 cm lesion) underwent a simple mastectomy without following chemotherapy or radiotherapy. Follow-up (at 6 and 12 months) consisted of mammography and clinical examination. One out of the 3 patients treated with large resection had a local relapse which was then treated surgically. There was no evidence of relapse at 12 months in the remaining patients with benign tumor. The patient with malignant PT returned to our attention with multiple bone metastases in the thoracic lumbar tract two years later. She received multiple courses of combined radiotherapy and chemotherapy. Local relapses do not appear to affect survival: as a consequence, wide excision should be the primary treatment of benign phyllodes tumors. Total mastectomy has been indicated for malignant phyllodes tumors and for very large tumors.