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Primary Hyperparathyroidism

What Is Primary Hyperparathyroidism?

Tissue changes in hyperparathyroidism. Courtesy Quizlet.com

Tissue Changes in Hyperparathyroidism Causing Brown Tumor. Courtesy Quizlet.com

Primary hyperparathyroidism is a parathyroid disorder characterized by excessive secretion of parathyroid hormone by one or more parathyroid glands for more than 6 months.

In primary hyperparathyroidism, blood calcium levels are high while phosphorus levels are decreased due to the action of parathyroid hormone.

Parathyroid hormone is produced by the four pea sized parathyroid glands that are located on the thyroid gland in the front of the neck. Partly because the thyroid and parathyroid glands share the same anatomic place in the body and partly because they have similar names, they are often confused although they have completely different actions.

Parathyroid hormone normally keeps calcium and the opposing mineral phosphorus levels in balance by drawing calcium as needed from bones to increase it in blood and releasing excess phosphorus through the kidneys to decrease blood levels.

Primary hyperparathyroidism is commonly caused by an adenoma (tumor) in a parathyroid gland (80%) or 15% due to hyperplasia of gland tissue (overgrowth). It is seldom associated with autoimmune disorders. However, cancer is a  possibility.

Q: What is a parathyroid adenoma?

A: A parathyroid adenoma is usually a solitary, well circumscribed, soft, tan reddish-brown nodule with a capsule. Gland tissues outside of the adenoma are normal or slightly shrunken (not needed anymore).1

Untreated, primary hyperparathyroidism results in cyst formations in bone marrow (osteitis fibrosa cystica) and brown tumors in bone tissue. Cysts contain large amounts of fibrous tissue with areas of hemorrhage. Brown tumors contain aggregates of osteoclasts (bone cells), hemorrhage and giant cells resembling neoplasms.2

Here is the symptomatolgy: “Painful Bones, Renal Stones, Abdominal Groans, and Mental Moans.”

What Is Primary Hyperparathyroidism In Celiac Disease and/or Gluten Sensitivity?


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  1. http://quizlet.com/32428692/pathology-of-parathyroid-and-bone-flash-cards 

  2. http://quizlet.com/32428692/pathology-of-parathyroid-and-bone-flash-cards/ 

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