ICAM1 and cancer: ICAM-1 expression in cancer cells was the score with the high-score method with a median expression level of 20 (range 0 to 200); 43 cases (91.48%) were scored as 1+ (median expression level of 20 range 5–90) and four (8.52%%) as 2+ (median expression level of 80 range 60–100).