Figure 3.

Parathyroid mass on ultrasound examination in a 9-year-old domestic medium haired spayed female cat with hypercalcemia and mild depression. Note the hypoechogenic mass (solid arrows) below the thyroid (open arrow), which is the abnormal parathyroid gland (PTG; height 1.4 mm, length 2.8 mm). Even with the high frequency ultrasonographic technique available today, the normal feline PTG is too small to be seen. This mass was confirmed to be a PTG adenoma following surgical removal and histopathology. Courtesy of Dr John Mattoon, Washington State University College of Veterinary Medicine, USA