PPARG and neuroblastoma: In the recent past, it has been observed that in different NB cell lines expressing PPARγ, endogenous or synthetic ligands induce anti-neoplastic effects such as cell differentiation, apoptosis, growth arrest, reduced viability and inhibition of invasiveness (Emmans et al, 2004; Servidei et al, 2004; Valentiner et al, 2005; Cellai et al, 2006; Peri et al, 2008).