Here is the previous thread with that info:Where did you find that thread about the tumor, etc.? I have a similar-sounding problem, but with only one bird out of 12 so far. The rest seem fine. Nonetheless, I'd like to understand the possible implications.
https://www.backyardchickens.com/threads/necropsy-results.1461071/
You can start a new thread of your own about your chicken if you like:
https://www.backyardchickens.com/forums/emergencies-diseases-injuries-and-cures.10/post-thread