Actually that part is a legitimate classification and not part of the AI nonsense. Broadly, lung cancers are classified as either “small cell” cancers or “non small cell” cancers based on how the tumor appears microscopically. The “non small cell” cancers can be further subdivided into various types.

The reason for this distinction between the two is due to the significant difference in clinical management and prognosis. Having “small cell” lung cancer is effectively a death sentence, whereas the other types are a lot more treatable.