Not long ago, discussion was focused on whether cannabis caused cancer. A thorough review by the US National Academies of Sciences, Engineering, and Medicine found moderate evidence of no statistical association between cannabis use and the development of lung and head and neck cancers.¹ Limited evidence of a statistical association was found between cannabis use and the development of nonseminomatous testicular carcinomas without good support for a causative effect. Throughout the past few years, the pendulum has swung to the point where many patients with cancer diagnoses are convinced, mainly by internet testimonials, that cannabis, particularly highly concentrated oils or tinctures of Δ⁹-tetrahydrocannabinol (THC) and/or cannabidiol (CBD), may actually cure their cancers. What is the basis of this belief?

不久前，讨论的焦点是大麻是否引起癌症。美国国家科学，工程和医学研究院的彻底审查发现，中度证据表明大麻使用与肺癌，头颈癌的发展之间无统计学联系。¹在使用大麻与非精原细胞性睾丸癌的发展之间没有统计关联的有限证据，而没有很好的因果关系支持。在过去的几年里，钟摆转到到许多癌症患者的诊断确信这一点，主要是通过网络推荐，大麻，特别是Δ的高度浓缩油或酊剂⁹-四氢大麻酚（THC）和/或大麻二酚（CBD）实际上可以治愈其癌症。这种信念的基础是什么？