[Breast fibroadenoma: the morphological characteristics, morphogenesis and prognosis].

Morphology of mammary fibroadenoma (FA) is well studied while this is not the case for its morphogenesis and prognosis. The role of a stromal component in the development of FA is outlined. Immune response in FA is mainly directed to the fibroblasts. Further studies of mammary FA will allow one to reveal the biological properties of this tumour and to evaluate adequately its prognosis as in 0.5-2% of cases it undergoes malignant transformation.