I would be curious about this myself. After my first surgery my ENT
said it looked fungal, but I didn't really understand what it may look
like. AFter my 2nd surgery with a different ENT he didn't mention
fungal, but I don't think he went in as deep.  I believe he was mainly
after the polyps. I had a lot of those.  Some time after the 2nd
surgery (about 4 months) I took one dose of prednisone( I mean just
once and not a packet), GSE three times a day, Bromelain 3 times a day
and Oasis nose spray.  I have always used Neilmed 2x a day.  Anyway
about two weeks later I had some stuff which drained into the back of
my mouth. It felt like ground hamburger. About a teaspoon worth of it.
Anyway had been having trouble with airflow in my left nostril.  After
this came out I had better airflow and it continued to get better for
awhile. I have had larger chucks come out since then. Some as large as
4 or 5 mm. These were semi hard and dark. Sort of like torward the
black/gray end of the spectrum, but with a slight green tint. The
texture when smashed was more like slightly wet powder. I am assuming
this may be some fungal matter. I gave it to a tech at my Allergist
Office to analyze and he was suprised this came out of my nose.  He has
been doing this for years so I was rather suprised to hear that
response. According to the Doctor he said it showed infecetion, but
nothing else grew. So I don't know if this was dead fungal mass or
what.  Curious what other peoples thoughts are though.