What kind of sample is required for the test?


Invasive breast carcinoma, FFPE (formalin-fixed paraffin-embedded) tissue specimens (excisional biopsy specimens preferred). Large core biopsies are also acceptable.


Four slides: 5-μM sections on glass slides (A total of four unstained slides per patient are required; freshly cut sections should be sent within one week.) or one paraffin-embedded tissue block. If multiple blocks are available, select the tissue block with the highest amount of viable invasive tumor; submit only one block.