I certainly understand the anxiety over this, and the additional anxiety over two conflicting reports.
My lung surgeon really upset me on my first visit by saying he thought my lymph nodes were enlarged and he suspected more extensive cancer than the CT scan indicated.
But, the only sure fire diagnosis comes from tissue sample. Until then, they can only suspect. Turns out, in my case, he was wrong.
I don't know about the fluid situation, but what would that second doctor know about it if he hasn't even tested a sample? I wouldn't put a lot of stock in the 'opinion' of a man who hasn't conducted a test, when another doctor who has conducted the test has said negative.
Information is the only thing that will ease this anxiety, and, unfortunately, it takes a bit of time. Seems like forever for those of us waiting, but it will all happen.
I wish your friend the best of luck and please keep us posted.
Cindy