Immunostaining was done with appropriate positive and negative controls and revealed:
ER: Positive with strong intensity in 50% of tumor cells (Allred score 7/8).
PR: Positive with strong intensity in 40% of tumor cells (Allred score 7/8).
HER2: negative score 0.
Ki-67 labeling index about 7%.
Referred block for immunostaining of Lt. breast mass tru-cut biopsy, diagnosed as invasive carcinoma (NST), grade 2 (pathology number 4398-2026, on 1 July 2026).
One referred paraffin block.
Immunostaining of Lt. breast mass tru-cut biopsy: