Abundant PPARγ expression has been detected in different tumours affecting the nervous system, such as astrocytomas (Chattopadhyay et al, 2000), gliobastomas (Nwankwo and Robbins, 2001; Morosetti et al, 2004) and NB (Han et al, 2001). The gene discussed is PPARG; the disease is neuroblastoma.