PECAM1 and neoplasm: Image analysis measurements for average CD-31 density on PID 21 for Tumor-No EA, EA-2X/3, and EA-2X/7 in the periphery were 883 ± 289.5, 404 ± 257.1, and 723 ± 153.0, respectively; in the core the average CD-31 densities were 1404 ± 195.3, 661 ± 219.6, and 1969 ± 547.7, respectively.