Information on collection, storage, and volume
Formalin-fixed, paraffin-embedded (FFPE) tissue block or slides. Fixative should be neutral buffered formalin.
As many as six unstained slides (see table below) at 10 μM and one matching H&E-stained slide or formalin-fixed, paraffin-embedded (FFPE) tissue block. The tumor cellularity percentage within the circled tumor area on the H&E-stained slide must be ≥10%. The circled tumor surface area on the H&E-stained slide must be ≥4mm².
Measured Tumor Surface Area
on H&E-stained Slide (mm²)
Maintain specimen at room temperature.
Tumor block containing insufficient tumor; broken or stained slides; core needle biopsy; DCIS specimen; specimen with four or more positive nodes; fresh, frozen, or nonbreast cancer tissue
Submit at room temperature. Indicate date and time of collection on the test request form.