CNR1 and neoplasm: Preet et al. (2008) indicated that delta9-Tetrahydrocannabinol inhibited lung cancer cell migration in vitro as well as its growth and metastasis in vivo. Gustafsson et al. (2008) showed that therapeutic options using ABR ligands had the efficacy of reducing tumor burden in malignant lymphoma overexpressing CB1 and CB2.