Abstract
This study investigated the potential of DYRK2, a dual-specificity tyrosine-(Y)-phosphorylation-regulated kinase gene, to predict disease-free survival for patients with early stage breast cancer. Two hundred and seventy-four patients with breast cancer underwent surgery from January 2000 to December 2009. All patients were in stage I or II. Immunohistochemical (IHC) analysis was used to determine the expression of DYRK2, which was examined for its association with clinicopathological factors or prognosis. A total of 85 of 274 cases (31%) were DYRK2 positive. No correlation was found between DYRK2 expression by IHC and clinicopathological factors such as tumor size, histological grade, hormone receptor status, and HER2 status; however, lymph node involvement was closely associated with DYRK2 expression. Ten-year disease-free survival in the DYRK2-positive group without node metastasis (95.9%) was significantly better than that in the DYRK2-negative group (87.3%, p = 0.015). These data show that DYRK2 expression is associated with lymph node involvement and is a possible predictive factor of breast cancer recurrence.
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