BIRC5 and neuroendocrine carcinoma: Whereas no difference became evident in the frequence of gains located within the chromosaml region of survivin when comparing G1/G2 NET with G3 NEC (62.5% versus 57.1%) (Figure 1A), we observed a higher percentage of XIAP CNGs in the biologically aggressive group of NECs (NET : NEC = 16.7% : 38.1%) (Figure 1B).