Mammary gland fibroma can ache, how can ability differentiate malignant or benign

Most breast fibroadenomas are benign tumors, malignant transformation is rare, less than one percent, usually painless mass, will not be accompanied by pain. Distinguish breast fibroadenomas is benign or malignant, can be judged by color Doppler ultrasound examination, if necessary, can do pathological biopsy.