Small HER2-positive, node-negative breast cancer: who should receive systemic adjuvant treatment?

Publication

Small HER2-positive, node-negative breast cancer: who should receive systemic adjuvant treatment?

Journal Paper/Review - Jun 20, 2010

Jörger Markus, Thürlimann Beat, Huober Jens

Citation

Jörger M, Thürlimann B, Huober J. Small HER2-positive, node-negative breast cancer: who should receive systemic adjuvant treatment?. Ann Oncol 2010; 22:17-23.

Type

Journal Paper/Review (English)

Journal

Ann Oncol 2010; 22

Publication Date

Jun 20, 2010

Issn Electronic

1569-8041

Pages

17-23

Brief description/objective

Adjuvant treatment of early-stage breast cancer with combined trastuzumab and chemotherapy has become standard in patients with HER2-positive tumors and a diameter of >1 cm or positive lymph nodes. Currently, there are no data directly supporting the use of adjuvant treatment, including trastuzumab, in patients with HER2-positive tumors, a diameter of <=1 cm and no nodal involvement (pT1a,bpN0M0). However, 6%-10% of these small tumors are HER2 positive, and there is good evidence for an inferior clinical outcome in these patients, with recurrence rates of up to 30% after 5-10 years. Assumed that the relative risk reduction is similar to larger tumors, the absolute benefit should be large enough to consider adjuvant treatment. This review addresses current data regarding the prognosis of small HER2-positive tumors and discusses potential factors to individualize adjuvant treatment in patients with small HER2-positive tumors.