Table 3.

Success Rate of Molecular Testing Based on Cumulative Tumor Cell Count

No. Cumulative Tumor Cellsa	No. of Cases	Molecular Success Rate,b %
>1000	11	100
>500–1000	6	100
>100–500	25	100
>50–100	6	100
10–50	3	66
<10	3	33
NDc	13	79

Abbreviations: H&E, hematoxylin-eosin; ND, not determined.

^aAs determined by evaluation of 1 H&E slide per block for all blocks in the case.

^bMolecular success determined by successful completion of at least 1 molecular test.

^cAll representative H&Es slides were required to be available for evaluation of tumor cell content.