[Spindle cell breast sarcoma].

A voluminous tumor of the right breast, weighing 3,950 g, is described in a 42-year-old malagasy woman. On microscopic examination eight of ten slides showed a monomorphic proliferation of spindle cells; on the two slides, they were associated with scarce ducts and rare epithelial cell clusters. This case raises the question of the association of a phyllodes tumor with a spindle cell sarcoma and their prognostic significance.