Volume 26, Issue 3 (5-2022)                   IBJ 2022, 26(3): 175-182 | Back to browse issues page

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Niknam K, Safaei A, Ghaderi A. Evaluation of the Prognostic Value of CD56 (140 kDa Isoform) Expression in Breast Cancer Tissues: an Eight-Year Retrospective Study. IBJ 2022; 26 (3) :175-182
URL: http://ibj.pasteur.ac.ir/article-1-3596-en.html
Background: Identification of specific antigens is highly beneficial for early detection, diagnosis, staging, and outcome prediction of cancer. This study aimed to evaluate the expression and prognostic value of CD56 (140 kDa isoform) in invasive ductal carcinoma (IDC).
Methods: Sixty-five patients with IDC who underwent radical surgery or mastectomy as the primary treatment were included. Proper formalin-fixed and paraffin embedded tissue blocks of the patients were prepared and stained by IHC for CD56 (140 kDa isoform) molecule. Chi-square and fisher exact tests were used to compare the results against the clinicopathologic data of patients. Kaplan-Meier and log-rank test were employed to study the prognostic value of the target antigen.
Results: The expression pattern of CD56 was granular and cytoplasmic. There were significant associations between the intensity of CD56 expression in invasive cells and carcinoma in situ (p = 0.005) and normal ducts (p = 0.010). Among all clinicipathologic parameters, there was only a significant association between the expression of estrogen receptor (ER) and CD56 (p = 0.023). Neither OS (overall survival; p = 0.356) nor DFS (disease-free survival; p = 0.976) had significant correlation with CD56 expression.
Conclusion: Our data indicated that the CD56 marker offers no prognostic value in terms of predicting the OS or DFS for up to eight years after primary surgery. Furthermore, the intensity of its expression is similar between normal, non-invasive, and invasive cells. Considering the generally better outcome of ER+ BC patients than their ER-counterparts, the CD56 marker may be indirectly associated with a more favorable prognosis among IDC patients.

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