Outcome after breast conservation treatment with radiation for women with triple-negative early-stage invasive breast carcinoma.
BACKGROUND
Triple-negative breast carcinoma is defined by a primary tumor that is estrogen receptor negative, progesterone receptor negative, and HER2 negative. The current study was performed to determine the relationship of triple-negative tumor status to outcome after breast conservation treatment with radiation.


METHODS
A total of 519 women with early-stage invasive breast carcinoma underwent breast conservation treatment with radiation. Of the 519 primary breast carcinomas, 90 (17%) were triple negative and 429 (83%) were not triple negative. The median follow-up after treatment was 3.9 years.


RESULTS
Compared with the patients without a triple-negative tumor, the patients with a triple-negative tumor had a higher 8-year rate of any local failure (8% vs. 4%, respectively; P = .041) and a lower 8-year rate of freedom from distant metastases (81% vs. 92%, respectively; P = .0066). There were no differences between the 2 groups for local-only first failure, overall survival, or contralateral breast cancer (all P >or= .3). On multivariate analysis, triple-negative tumors had an increased risk for any local failure (hazard ratio, 2.58), although this difference was not statistically significant (P = .097).


CONCLUSIONS
After breast conservation treatment with radiation, women with a triple-negative tumor had a higher rate of local failure compared with women without a triple-negative tumor. However, the absolute difference in local failure between the 2 groups was relatively small and therefore does not preclude breast conservation treatment with radiation for triple-negative early-stage invasive breast carcinoma.
Department of Radiation Oncology, University of Pennsylvania School of Medicine, Philadelphia, PA 19141, USA. solin@einstein.edu
Lawrence J
LJ
Solin
Wei-Ting
WT
Hwang
Neha
N
Vapiwala
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001943:Breast Neoplasms / Q000378:metabolism / Q000401:mortality / Q000532:radiotherapy*; D018270:Carcinoma, Ductal, Breast / Q000378:metabolism / Q000401:mortality / Q000532:radiotherapy*; D003131:Combined Modality Therapy; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000378:metabolism / Q000401:mortality / Q000532:radiotherapy*; D009367:Neoplasm Staging; D009376:Neoplasms, Hormone-Dependent / Q000378:metabolism*; D011879:Radiotherapy Dosage; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000378:metabolism*; D011960:Receptors, Estrogen / Q000378:metabolism*; D011980:Receptors, Progesterone / Q000378:metabolism*; D015996:Survival Rate; D016896:Treatment Outcome
D018719:Erb-b2 Receptor Tyrosine Kinases; D011960:Receptors, Estrogen; D011980:Receptors, Progesterone