Imaging Biomarkers for HER2-Positive Breast Cancer: Evidence from an Observational Study.

In each ACR category, HER2-positive tumors demonstrated microcalcifications more frequently than HER2-negative tumors (e.g., 33.3% versus 11.8% in ACR A; see Table 2 ), although these within-category differences did not reach statistical significance due to limited sample sizes in each subgroup.

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