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Comparison of EGFR expression in primary CRC and their synchronous metastatic sites on whole tissue sections and TMA
| Primary site | Metastases | Matched sites | |
|---|---|---|---|
| Tissue sections | 27/32 (84%) | 30/32 (94%) | 25/32 (78%) |
| First TMA | 18/31 (58%) | 18/29 (62%) | 9/28 (32%) |
| Second TMA | 14/31 (45%) | 16/29 (55%) | 8/28 (29%) |
| Both TMAs | 20/31 (65%) | 19/29 (66%) | 12/28 (43%) |
Data are expressed as the number of positive cases/total number of specimens
