Assessing separately the NSCLC and SCLC groups, we found significantly lower survivin levels in patients with NSCLC than in those with SCLC or in control subjects (NSCLC vs. SCLC p = 0.0053, NSCLC vs. controls p = 0.0004), but there was no significant difference between patients with SCLC and control subjects (SCLC vs. controls p = 0.3344). This evidence concerns the gene BIRC5 and small cell lung carcinoma.