Just wanna supply the top 2 entries on googling this matter--

1. https://www.carcinoid.org/for-patients/videos/carcinoid-tumors-and-carcinoid-syndrome-what-they-are-how-thay-behave-and-how-they-are-diagnosed/

The link above for "Carcinoid Tumors and Carcinoid Syndrome: What they are, how thay behave and how they are diagnosed" mentions:

"...They also have the ability to stain with silver salts, so they have been called argentaphylic and this is because the silver will stain these cells. Some of the tumors or some of the cells, depending on where they arise in the body, whether it be in the lung or in the intestine or in the rectum, have slightly different abilities, affinities, to take up these silver stains"

2.https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2901509/ this link for "Carcinoid Tumors" says:

"Carcinoid tumors have traditionally been classified based upon the embryologic site of origin, morphologic pattern, and silver affinity...Likewise, the early divisions of carcinoid tumors were based on the staining characteristics when stained with silver. Cells of foregut and rectal tumors accumulate cytoplasmic silver deposits only after being treated with a reducing agent, bestowing the term argyrophil cells. Conversely, the cytoplasm of midgut tumors contains granules which stain black with ammoniacal silver nitrate, which is known as a positive argentaffin reaction"

Again, my sister in law stumbled upon its trait of silver affinity when doing a research on carcinoid tumor, which she had and now in remission from it after surgery. She's been an active user.

Please do not directly associate silver affinity with being silver loving.

There are numerous chemical substances that will bind to silver that may be produced within certain cells.

The binding of certain cells to silver could just as easily suppress the tumor growth as it could increase the growth. In fact, it is highly unlikely that the silver would increase the growth of the tumor in any case.

The difference is in whether the affinity causes cancer, NO, or whether the cancer creates compounds that will bind to silver.