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Sample B3: Early radial sclerosing lesion (RSL) with dense tumour‐like nidus. Displayed somatic mutation in PIK3CA: H1047R (H&E).
A. Whole slide scan – pre‐dissection.
B. Whole slide scan – post‐dissection.
C. Adenosquamous proliferation of early RSL (scan 1.7×).
D. Adenosquamous proliferation of early RSL (scan 29×).
