This suggestion is based on recent evidence, whereby GPR55 has been demonstrated to be an essential/key player in the molecular machinery involved in the regulation and modulation of the signalling pathways responsible for malignant transformation, tumour growth and progression (Dorsam and Gutkind 2007), especially as GPR55 expression correlates in a tumour ‘aggressiveness’-related manner (Andradas et al. 2011). This evidence concerns the gene GPR55 and neoplasm.