The Parathyroid Glands
Hyperthyroidism I: Introduction
Hyperthyroidism II: Pathophysiology
Graves' Disease I: Introduction
Graves Disease II: Pathophysiology
Hypothyroidism II: Pathophysiology
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Updated: Jul 21, 2026

Two Techniques to Create Hypoparathyroid Mice: Parathyroidectomy Using GFP Glands and Diphtheria-Toxin-Mediated Parathyroid Ablation
Published on: March 14, 2017
Mario Sianesi1, Paolo Del Rio, Maria Francesca Arcuri
1Institute of General Surgery and Organ Transplant, University of Parma, Italy. paolofelisso@hotmail.com
This study examined the coexistence of thyroid and parathyroid disease in patients undergoing thyroid surgery. Out of 221 patients, 29 had elevated parathyroid hormone levels before surgery. These patients underwent neck imaging and some had MIBI scans. In 19 cases, parathyroid disease was confirmed, including adenomas and hyperplasia. Ten patients had normal parathyroid glands and did not need surgery. The authors suggest that thyroid patients with elevated PTH should be evaluated for parathyroid disease. They recommend accurate neck exploration and preoperative testing to guide surgical decisions.
Area of Science:
Background:
The relationship between thyroid and parathyroid diseases is not fully understood. Prior research has shown that these glands often coexist in disease states. However, the extent of this association remains unclear. No prior work had resolved how frequently thyroid disease occurs alongside parathyroid disorders. This gap motivated the need for a focused analysis of coexisting thyroid and parathyroid conditions. It was already known that thyroid surgery is common in certain populations. Yet, the role of parathyroid disease in these patients is less established. This paper addresses the lack of clarity about surgical management in these combined cases.
Purpose Of The Study:
This study aimed to investigate the frequency of parathyroid disease in patients undergoing thyroid surgery. The specific problem was the unclear surgical role in cases of subclinical hyperparathyroidism. The motivation was to determine whether thyroid disease patients with elevated PTH should also undergo parathyroid surgery. The authors sought to clarify the diagnostic and surgical approach in these combined cases. They examined a specific cohort of patients with thyroid disease and elevated PTH levels. The goal was to assess the prevalence of parathyroid pathology in these individuals. The study also aimed to evaluate the utility of diagnostic imaging in these cases. The findings could inform surgical protocols for dual gland disease.
Main Methods:
The study followed a prospective design from July 1999 to June 2001. It included all patients who underwent thyroid surgery at the institution. Researchers evaluated preoperative serum PTH and calcium levels in these patients. Ultrasonography was performed on all participants to assess neck anatomy. Eleven patients also received 99Tc-MIBI scanning to detect parathyroid abnormalities. Intraoperative exploration was conducted in 19 cases of HPP. These cases included 14 parathyroid adenomas and 5 hyperplasias. Ten patients had normal parathyroid glands and did not undergo parathyroidectomy.
Main Results:
Out of 221 thyroidectomies, 29 patients had elevated preoperative PTH levels. Ultrasonography was used in all 29 cases to evaluate parathyroid size and structure. Nine out of 29 patients had parathyroid disease confirmed intraoperatively. Fourteen cases involved parathyroid adenomas and five involved hyperplasia. Ten patients had normal parathyroid glands and did not require parathyroidectomy. Diagnostic imaging, including 99Tc-MIBI scans, was used in 11 patients. The study found a significant association between thyroid and parathyroid disease. Elevated PTH levels were a key indicator for further parathyroid evaluation.
Conclusions:
The authors suggest that thyroid disease patients with elevated PTH should be considered for parathyroid surgery. They propose that a combined surgical approach is warranted in these cases. The study supports the need for accurate neck exploration in dual gland disease. The findings indicate that parathyroid pathology is not rare in thyroid surgery patients. The authors emphasize the importance of preoperative PTH and calcium testing. They recommend ultrasonography and possibly MIBI scans for diagnostic accuracy. The study highlights the value of intraoperative parathyroid assessment. These conclusions are based on the observed frequency of parathyroid disease in the cohort.
The study found that 29 out of 221 thyroid surgery patients had elevated preoperative parathyroid hormone levels.
Ultrasonography was used in all 29 patients, and 11 received 99Tc-MIBI scans for parathyroid imaging.
Elevated PTH and calcium levels suggest possible parathyroid pathology, guiding the need for parathyroidectomy.
Intraoperative exploration identified 14 parathyroid adenomas and 5 cases of hyperplasia in 19 patients.
Ten patients had normal parathyroid glands and did not require parathyroid surgery.
The authors suggest these patients should be considered for combined thyroid and parathyroid surgery.