[Lani]

without sounding too academic (wouldn 't it be great if it was the vodka), there are some tumors whose growth is encouraged by vitamins and "supplements"

Which ones do you take? Are you also aware that supplement companies were grandfathered in and DO NOT HAVE TO LIST ALL THEIR INGREDIENTS ON THEIR labels. There could be something in the supplement not identified which might encourage your tumors/mets growth.

One only gets clues as to what might be going on when one STOPS taking something (not always an easy thing to do in your circumstances!)

Again, wouldn't it be nice if it were the vodka (most papers show alcohol consumption to encourage tumor growth and metastasis), but I would look into the other possibilities!