Oh man. I am crying as I right this. I think it’s lymphoma because I am starting to see very small raised moles on his testicles. Thank you , I will take him to the vet as soon as possibleUnfortunately it looks like it could be a tumor.
Medirabbit: lymphoma in rabbits
If somehow it isn't a tumor and related to the mole developing into a growth, it has a similar appearance to a botfly cyst. For the later stage, there will likely be a hole in the middle of it, for the larvae.
Medirabbit: botfly
But either one does need the proper medical treatment.
https://rabbit.org/veterinarians/
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