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Table 1 Origin of tissue specimen and histology of colonic adenomatous tissue samples.

From: Decreased expression of cytochrome P450 protein in non-malignant colonic tissue of patients with colonic adenoma

  Patients with adenoma Disease-free controls
  Normal tissue Adenoma Normal tissue
Ascending colon 8 7 8
Descending colon 8 12 5
Sigmoid colon and rectum 9 6 14
Tubular adenoma - 12 -
Tubular villious adenoma - 10 -
Villious adenoma - 3 -