Hi,
I've been researching this forum, and I, too, believe mold has something to do with lymphoma---of course, other factors, too.
Right before my collarbone lymph node swelled, I cleaned our entire damp basement (took about 5 days)--cleaned 6 kitty litter boxes inside & out---then proceeded to get stressed out about going out of town. I believe, had it not been for the mold, perhaps maybe my lymphoma wouldn't have popped up, like it did. Maybe it's a good thing???

Or else...it could've moved through my system to a bigger organ.
Since my diagnosis, my husband got a "state-of-the-art" dehumidifier, and it's been going (literally) non-stop downstairs. I wish he would've done that earlier---I've got to stop these "what if's."
Someone said on your post that they thought lymphoma is caused by one's diet/environmental/& stress....I think, add to that: mold.
Anyway---I'm in agreement with you about mold. Those spores can play havoc with one's system. I've turned over the kitty litter cleaning to my husband. I can't part with my beloved kitties, though. I keep hand-cleaner sanitizer everywhere, because I know cats are associated with certain illnesses.
Hope you're doing better.

S.