Pancreas biopsy method(s)??

Pancreas biopsy method(s)??

I was scheduled to have a biopsy of my pancreas today. However, rather
than call me and tell me it was cancelled, I found out when I went to
the hospital! They said that my stomach doctor did not want the test
where they use a CT scanner and pinpoint the exact area and then use a
needle (aspiration) and get a sample. He said that in some cases, if
the tumor is cancerous, the cancerous cells can bleed out and infect
other organs. He wants me to go to the University of Ann Arbor
Hospital and have a different type of thing done where they stick a
tube down your throat and do something that way. Anyone ever hear of
such a test and if so, what is it called and explain it further. I was
just told all of this by the hospital today and have heard nothing
from my Dr. or the hospital in Ann Arbor, Michigan.

Thanks,
Waldo