Usually solitary
Soft, tan red
Usually in the inferior parathyroids
May be found in other sites such as thymus, thyroid
0.5-5 grams
Capsule present
Compression of adjacent gland
Minimal to loss of fat in the gland
Usually composed of chief cells. However oxyphil cells may also be present
Cells usually arranged in sheets, trabeculae or follicles
Monoclonal in origin