[A rare breast tumor: mammary fibromatosis. Two case reports and a review of the literature].

Aggressive fibromatosis of the breast is an uncommon benign disease. The clinical and X-Ray findings can simulate breast cancer. The diagnosis relies on histology. The typical feature of this disease is a locally aggressive but non metastasizing lesion with high recurrence rate. Treatment consists in wide excision. The role of radiation and drug therapy including antiestrogens has not been clearly established. Colonoscopy is indicated to research for an association with Gardner syndrome.