Study published in Annals of Diagnostic Pathology.
17 percent discordance in Luminal HER2-negative tumors using MIB1 and SP6.
Both antibodies show significant correlation in Ki-67 scoring (r = 0.755).
No significant difference in mean proliferative indices (p = 0.288).
Importance of standardizing antibody use in Ki-67 assessment to accurately classify tumors.
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