手术时间间隔和分子亚型可影响乳腺癌患者针刺活检后Ki67变化

BMC Cancer. 2015 Oct 30;15:822.

Surgery time interval and molecular subtype may influence Ki67 change after core needle biopsy in breast cancer patients.

Chen X, Zhu S, Fei X, Garfield DH, Wu J, Huang O, Li Y, Zhu L, He J, Chen W, Jin X, Shen K.

Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China.

University of Colorado Comprehensive Cancer Center, Aurora, CO, 80045, USA.

BACKGROUND: To investigate the accuracy of core needle biopsy (CNB) in evaluating breast cancer estrogen receptor (ER), progesterone receptor (PR), HER2, and Ki67 status and to identify factors which might be associated with Ki67 value change after CNB.

METHODS: A retrospective study was carried out on 276 patients with paired CNB and surgically removed samples (SRS). Clinico-pathological factors as well as the surgery time interval (STI) between CNB and surgery were analyzed to determine whether there were factors associated with Ki67 value change after CNB. Five tumor subtypes were classified as follows: Luminal A, Luminal B-HER2-, Luminal B-HER2+, Triple Negative (TN), and HER2+. Ki67 value change was calculated as SRS minus CNB.

RESULTS: Mean STI after CNB was 4.5 (1-37) days. Good agreement was achieved for ER, PR, and HER2 evaluation between CNB and SRS. However, Ki67 expression level was significantly higher in SRS compared with CNB samples: 29.1 % vs. 26.2 % (P<0.001). Both univariate and multivariate analysis demonstrated that STI and molecular subtype were associated with a Ki67 change after CNB. Luminal A tumors experienced more Ki67 elevation than Luminal B-HER2- diseases (6.2 % vs -0.1 %, P=0.014). Patients with longer STI after CNB had a higher Ki67 increase: -1.1 % within 1-2 days, 2.1 % with 3-4 days, and 5.6 % more than 4 days, respectively (P=0.007). For TN and HER2+ tumors, the Ki67 change was apt to be 0 with STI≤4 days, while a >7 % Ki67 increase was noticed in patients with STI≥5 days.

CONCLUSION: CNB was accurate in evaluating ER, PR, HER2, and molecular subtype status. Ki67 value significantly increased after CNB, which was associated with STI and molecular subtype. Further translational research needs to consider Ki67 changes following CNB among different breast cancer molecular subtypes.

PMID: 26514283

DOI: 10.1186/s12885-015-1853-1

PMCID: PMC4627413