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. 1997 Jul 22;94(15):8132–8137. doi: 10.1073/pnas.94.15.8132

Table 1.

WT1 protein expression: Survey of immunostaining in normal and cancerous breast tissue

Tissue WT1 Neg WT1 Pos
Tumor 15 6
Normal 1 14

In 60% (9 of 15) of the tumors surveyed, WT1 immunostaining was absent in greater than 90% of the tumor cells (estimated by inspection). In the remaining 6 tumors, 50% or more of the tumor cells were estimated to be WT1-negative. Source of normal tissue: ducts and lobules with normal-appearing cellular architecture and nuclear morphology were often found in the vicinity of tumors and were used as controls (Normal). 

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