Levels of the sCD26, CEA, CA-19.9 and CA-72.4 in a representative individual (patient 42) with tumor persistence.

<p>The dashed arrow shows <i>exitus</i>.</p

Clinical and epidemiological characteristics of the patients according to the preoperative sCD26 levels.

<p>sCD26 levels were considered positive (≤460 or >850 ng/mL) or negative (460–850 ng/mL).</p><p><i>p</i>-values correspond to: *Fischer’s exact test; ⁺Pearson’s Chi-square.</p><p>Clinical and epidemiological characteristics of the patients according to the preoperative sCD26 levels.</p

Levels of the sCD26, CEA, CA-19.9 and CA-72.4 in one representative disease-free patient (patient 25).

<p>Black arrows indicate beginning and end of chemotherapy cycles.</p