Can cancer spread through a biopsy?

The term is called "seeding" and the answer to the title question is "certainly". I feel this literature review paper does a good job explaining it: Risk of tumor cell seeding through biopsy and aspiration cytology

Notice that it is not the same risk for all type of tumors (watch with breast and liver biopsies) but somehow internet and forums play down the risk. Nevertheless that may be more ignorance or trying to calm folks on something that anyhow may have to be done no matter the concerns. Probably the advice here is to think and even get further opinions before poking. In that sense, read the first reference of the above paper for something more dramatic, from a different angle/type author (naturist, which I plan to explore on separate post). Talks also about the risks of spreading through surgery.

The review above does not mention melanoma (I think) so I searched a bit on that case and looks like it can also happen but very seldom (see here and here). Maybe because the whole thing is removed soon after?