if a mass is suspected it can be visualized on x-ray or ultrasound, and in the case that one is found, your veterinarian may need to take a sample of the mass for biopsy.

Make this proper case.
If a mass is suspected it can be visualized on X-Ray or ultrasound, and in the case that one is found, your veterinarian may need to take a sample of the mass for biopsy.