and further from your link,
"Studies And ClinicalTrialsCancerThe anti cancer propertiesof THC, CBD, CBG and other cannabinoids are wellestablished."
Scientists have been investigating them since the early 1970s and more than 1100 papers on cannabinoids and cancer have been published. (42)It is also well established that cannabis helps with the side effects of cancer treatments, particularly nausea and lack of appetite.(43,44,45,46)Cannabis may also help alleviate anxiety, depression, insomniaand mood disorders in cancer patients. However, some patients may find exactly the opposite results(47)A very large quantity of anecdotal reports detail remarkable results with cannabis oil on many different forms of cancer.(48)One of the most important properties of cannabis as a cancer therapy is that it is non-toxic and even if little therapeutic effect is achieved, it causes littleharm.On balance, while there is good evidence of anti cancer propertiesin vitro (human cell lines) and in vivo (animal) studies, there is little evidence of actual results in humans except in the treatment of basal cell carcinoma(49). However, few would disagree that the palliative value of cannabis is of great benefit to many cancer patients.(50)Clinical trials are underway on cancer pain(51)and the treatment of glioma brain cancer(52).These selected studies indicate the evidence currently available.Cannabinoids and cancer: potential for colorectal cancer therapy. Biochem Soc Trans. 2005.
http://www.ncbi.nlm.nih.gov/pubmed/16042581(53)A pilot clinical study of Δ9-tetrahydrocannabinol in patients with recurrent glioblastoma multiforme, British Journal of Cancer, 2006
http://www.nature.com/bjc/journal/v95/n2/full/6603236a.html(54)Cannabinoids for Cancer Treatment: Progress and Promise. Cancer Res.2008.
http://cancerres.aacrjournals.org/content/68/2/339(55)Cannabidiol Induces Programmed Cell Death in Breast Cancer Cells by Coordinating the Cross-talk between Apoptosis and Autophagy. Mol Cancer Ther., 2011.
http://mct.aacrjournals.org/content/10/7/1161.long(56)The intersection between cannabis and cancer in the United States. CROH, 2011.
The intersection between cannabis and cancer in the United States: a new hope for breast cancer therapy? Cancer Treat Rev. 2012
http://www.ncbi.nlm.nih.gov/pubmed/22776349(58)Towards the use of cannabinoids as antitumour agents. Nat Rev Cancer. 2012
http://www.ncbi.nlm.nih.gov/pubmed/22555283(59)"