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Table 3 The expression of IDO in primary tumors and matched lymph node metastases (N = 41)

From: The paradoxical patterns of expression of indoleamine 2,3-dioxygenase in colon cancer

  IDO expression P value
  - + ++ +++  
Primary tumor (%) 18 (43.9) 15 (36.6) 6 (14.6) 2 (4.9) 0.020
Metastasis(%) 27 (65.9) 14 (34.1) 0 0