J Breast Cancer.  2016 Sep;19(3):261-267. 10.4048/jbc.2016.19.3.261.

Histomorphological Factors Predicting the Response to Neoadjuvant Chemotherapy in Triple-Negative Breast Cancer

Affiliations
  • 1Department of Pathology, Myongji Hospital, Goyang, Korea.
  • 2Department of Pathology, Jeju National University Hospital, Jeju, Korea.
  • 3Department of Pathology, Bucheon St. Mary's Hospital, The Catholic University of Korea College of Medicine, Bucheon, Korea.
  • 4Department of Pathology, Seoul National University Hospital, Seoul, Korea. karlnash@naver.com

Abstract

PURPOSE
There is no standard targeted therapy for the treatment of triple-negative breast cancer (TNBC). Therefore, its management heavily depends on adjuvant chemotherapy. Using core needle biopsy, this study evaluated the histological factors of TNBC predicting the response to chemotherapy.
METHODS
One hundred forty-three TNBC patients who received single-regimen neoadjuvant chemotherapy (NAC) with the combination of doxorubicin, cyclophosphamide, and docetaxel were enrolled. The core needle biopsy specimens acquired before NAC were used to analyze the clinicopathologic variables and overall performance of the predictive model for therapeutic response.
RESULTS
Independent predictors of pathologic complete response after NAC were found to be higher number of tumor infiltrating lymphocytes (p=0.007), absence of clear cytoplasm (p=0.008), low necrosis (p=0.018), and high histologic grade (p=0.039). In the receiver operating characteristics curve analysis, the area under curve for the combination of these four variables was 0.777.
CONCLUSION
The present study demonstrated that a predictive model using the above four variables can predict therapeutic response to single-regimen NAC with the combination of doxorubicin, cyclophosphamide, and docetaxel in TNBC. Therefore, adding these morphologic variables to clinical and genomic signatures might enhance the ability to predict the therapeutic response to NAC in TNBC.

Keyword

Core needle biopsy; Neoadjuvant therapy; Treatment outcome; Triple-negative breast neoplasms

MeSH Terms

Area Under Curve
Biopsy, Large-Core Needle
Chemotherapy, Adjuvant
Cyclophosphamide
Cytoplasm
Doxorubicin
Drug Therapy*
Humans
Lymphocytes, Tumor-Infiltrating
Necrosis
Neoadjuvant Therapy
ROC Curve
Treatment Outcome
Triple Negative Breast Neoplasms*
Cyclophosphamide
Doxorubicin

Figure

  • Figure 1 Representative microphotographs of tumor infiltrating lymphocytes (TIL) according to TIL grade (H&E stain, ×200). (A) None; almost no lymphocytes are present. (B) Mild; only a few lymphocytes infiltrate the tumor stroma. (C) Moderate; moderate lymphocytic infiltration in the stroma. (D) Severe; dense infiltration of lymphocytes surrounding the tumor nests.

  • Figure 2 Representative histopathologic parameters. (A) Peritumoral tumor infiltrating lymphocytes (TIL); the lymphocytes surrounding the peripheral tumor border. The border between the tumor nests and the inner stroma is demarcated by the black line, and lymphocytes in the stroma surrounded by the line are considered to be stromal TIL (H&E stain, ×200). (B) The left half of the core biopsy specimen is totally necrotized. Diffuse necrosis (H&E stain, ×100). (C) Tumor cells with clear cytoplasm (H&E stain, ×400).

  • Figure 3 Receiver operating characteristics analysis for prediction of pathologic complete response to neoadjuvant chemotherapy. AUC=area under the curve.


Cited by  1 articles

Comment on “Histomorphological Factors Predicting the Response to Neoadjuvant Chemotherapy in Triple-Negative Breast Cancer”
Kadri Altundag
J Breast Cancer. 2017;20(1):114-115.    doi: 10.4048/jbc.2017.20.1.114.


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