My adult cat Niko suddenly has developed sneezing symptoms and developed a lump between the eyes and above the nose. On occasion he has sneezed with signs of blood were present. We took him to our vet and they performed x-rays of his chest to make sure he doesn’t have respiratory infection which came back negative. They have already put him on two forms of antibiotics which have calmed down the sneezing and cleared up his eye some, but the lump is still present. They took biopsy of lump sent to lab for analysis which came back negative for cancer or fungal disease. They still are not sure what’s wrong with him. They don’t have small enough endoscope which can navigate up my cats nose to view if there is problem. I have already spent a lot of money and they want to charge $1200 more to flush nose and try to view whats the problem with instrument they view dogs ears which is the smallest instrument they have, which im worried about because if it doesn’t fix this problem were in same problem as before. Do you think it could be a polyp in his nasal cavity? He seems fine but won’t eat hard food anymore only soft food, maybe a little more tired than usual though.