This test evaluates if there are too many copies of the HER2 gene in the cancer cells. The results of these tests should then be taken into account in the final decision-making about treatment. If lumpectomy is indicated, long-term follow-up shows no advantage of a mastectomy over the lumpectomy. Io dine Fundraiser Shop. Most of the time, the recurrence will be recognized and the new tumor treated early but not always. Cancer detection are methods used to find cancer in persons who may or may not have symptoms.