L Am A 58 Year Old Women Just Had A

l am a 58 year old women just had a mammogram yesterday and ultra sound l saw on left breast side mammogram unknown white area on the muscle. breasts are somewhat dense the my lymph nodes have been enlarged on the left side for the past few months. the ultrasound also showed the same unknown white area and calcium spots my daughter was diagnosed with breast cancer at 24 l read on you tube an MRI should be called for to determine what this unknown white area