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Not satisfied. What does the "hardness" implicate? Is a lump that moves around less serious than one that is stationary? Is the location extra suspicious?
What should we expect the Vet to do once we go to the appointment. Are X-rays recommeneded? Is a lump usually asperated?
Hardness implicate nothing, it is not diagnostic or prognostic. The only one good test for diagnosis is biopsy. Most common biopsy is FNA- it is aspiration with small needle, usually diagnostic in about 70%, another type would be true cut biopsy when veterinarian use bigger needle to get small tissue sample, and finally wedge or biopsy when large amount of tissue is submitted to a pathology lab. Your vet will recommend you chest X rays, and regional lymph node aspiration. In some cases CT or MRI are performed. But everything starts with a visit to your vet and physical exam.