RASSF1A is a tumour suppressor in non‐small cell lung cancer, and its epigenetic silencing correlates with advanced disease, metastatic potential and adverse prognosis (Dammann et al, 2000, 2001; Dreijerink et al, 2001; Morrissey et al, 2001; Donninger et al, 2007). This evidence concerns the gene RASSF1 and neoplasm.