Most of us have 4 parathyroids, which are located behind the 4 "corners" of the thyroid gland.
The most common cause of high blood calcium is a parathyroid adenoma. An adenoma is not malignant. There are four parathyroid glands behind the thyroid gland. Occasionally an extra parathyroid can be elsewhere in the neck. You can have a Sestamibi Technetium scan to see possible enlarged parathyroid glands or adenoma.
The nature of the mass in the parotid salivary gland should be cleared up. A malignant tumor can also cause high calcium.
Have you had biopsy on either of the masses on the parotid gland or the left lobe of your thyroid gland? The only connection between the thyroid gland and the parathyroids is the location in the body. They have totally different functions, but yes, you'll need a scan to find out why your calcium levels are high.
The parotid glands are salivary glands; the thyroid gland produces hormones that control metabolism, body temperature, heart rate and other body functions; the parathyroids control the use of calcium in the body, which in turn controls electrical impulses.
I have a 2.5 cm mass on L parotid gland and a 3cm on my left thyroid and now because my blood calcium is high I need a special scan to look for a parathyroid adeoma I am told they are very small glands on the back of the thyroid where calcium is controlled,
I'm not sure I understand your question. What's all connected? What would you like help with?