Relative content of urea in different tumor areas, mM/g protein

Intact, n = 6

1 - 2 grade, n = 7

(Median; quartiles)

Mann-Whitney U-test

3-4 grade, n = 13

(Median; quartiles)

Mann-Whitney U-test

Adjacent non-cancerous tissues (3)

0.241 (0.211; 0.281)

1.998 * (1.718; 2.372

0.0495

1.959 * (0.975; 10.229)

0.010

Peritumoral zone (2)

0.241 (0.211; 0.281)

1.621* (1.381; 5.013)

0.0495

1.959 * (0.975; 10.229)

0.010

Tumor (1)

0.241 (0.211; 0.281)

1.920 * (1.421; 3.260)

0.020

1.260 * (0.340784314; 2.648)

0.051

Blood plasma

0.085 (0.08; 0.099)

0.092 (0.066; 0.110)

0.664

0.105 (0.089; 0.129)

0.065