See below. Atypcal hyperplasia can be a marker of pre-cancerous changes of the breast. A person with this finding may need a surgical biopsy to remove a portion of the breast tissue to be sure all is benign, or close monitoring. There would be no symptoms from this condition, and likely no breast lump associated with it either. Http://www. Mayoclinic. Com/health/atypical-hyperplasia/ds01018\p.