Persistent pain at 9oclock in left breast for a year. last week doctor found lump but ultrasound and mammogram showed nothing. what now?

Biopsy: While pain is not a characteristic of a tumor, regardless of what mammo or sono shows, the presence of a palpable lesion requires clarification. That is either a true cut needle that must show pathology and not normal tissue or an excisional biopsy under local anesthesia. Too many malignancies are watched until the have grown because mammo or sono considered neg.

The chance of: of malignancy is low in light of the negative mammo and ultrasound, but next step should probably be an evaluation by a breast surgeon.