I've seen them in my local organic foods shop.
Slime molds are some of my favorite things, incidentally, and that is roughly how they live. Lichens as well. They also break apart into little bundles of mixed cells, much like metastatis.
Here are some excerpts from related websites, and a few links.
"For example, in 1999 Meinolf Karthaus, MD, watched three different children with leukemia suddenly go into remission upon receiving a triple antifungal drug cocktail for their "secondary" fungal infections.(1)
Pre-dating that, Mark Bielski stated back in 1997 that leukemia, whether acute or chronic, is intimately associated with the yeast, Candida albicans. (2)
Finally, almost 50 years ago, Dr. J. Walter Wilson, in his textbook of clinical mycology, said that "it has been established that histoplasmosis and such reticuloendothelioses as leukemia, Hodgkin's disease, lymphosarcoma, and sarcoidosis are found to be coexistent much more frequently than is statistically justifiable on the basis of coincidence." (3)"
The late Milton White, MD., did exactly this. He fully believed that cancer is a "chronic, intracellular, infectious, biologically induced spore (fungus) transformation disease." (4) Using the proper isolation techniques (involving saline instead of formaldehyde as a tissue transportation medium between the operating room and the pathology lab), he was able to find fungal spores in every sample of cancer tissue he studied. His lifetime work has been routinely dismissed as nothing more than an unproven postulate."
from
http://www.mercola.com/2003/may/24/cancer_contagious.htmAlso see:
http://www.doctorfungus.org/http://www.rense.com/general44/russell.htm