[Phyllodes tumors of the breast. Apropos of 83 cases]

Twelve recurrences after surgical treatment of 83 cystosarcoma phyllodes of the breast were reported. The histology of the initial tumor was benign (n = 73), borderline (n = 6), sarcoma (n greater than 4). Nine recurrences were observed at the initial site of the tumor (2 in another quadrant of the same breast and I in the contralateral breast). The cause of local recurrence is related to incomplete tumorectomy (n = I), pseudo-capsule infiltration (n = 3), micro-nodules satellites (n = 2). No etiology for recurrence was defined in 3 cases. The importance of a careful microscopic examination of the initial tumor is emphasized because the infiltration of the pseudo-capsule and the presence of micro-nodules satellites can only be recorded on correctly prepared slides.