GATA3 and carcinoma: Indeed, our previous analysis of CK5-expressing (IHC defined basal-like) carcinomas demonstrated 82%, 30% and 23% positivity with any staining for GATA3, MGB and GCDFP-15, respectively, but this decreased to 23%, 12% and 9% by applying a cut-off as low as > 5% staining [17].