Primary hyperparathyroidism--early diagnosis in patients referred for thyroid surgery

Area of Science:

• Endocrinology
• Surgical Oncology
• Clinical Diagnostics

Background:

• Primary hyperparathyroidism (PHPT) affects 1% of patients undergoing thyroid surgery.
• A significant portion of PHPT patients are classified as asymptomatic.
• PHPT can be incidentally discovered during thyroid surgery.

Purpose of the Study:

• To compare clinical characteristics and outcomes of PHPT patients undergoing parathyroid surgery versus those with incidental PHPT during thyroid surgery.
• To determine the prevalence and presentation of undiagnosed PHPT in patients referred for thyroid surgery.
• To evaluate the necessity of preoperative parathyroid assessment.

Main Methods:

• Retrospective comparison of 135 patients referred for parathyroid surgery (Group I) and 55 patients referred for thyroid surgery with undiagnosed PHPT (Group II).
• Group II was further divided into IIa (preoperative biochemical evidence) and IIb (intraoperative findings).
• Comparison included clinical manifestations, biochemical data, pathology, complications, and outcomes.

Main Results:

• Group I patients showed more frequent renal, osseous, and gastrointestinal symptoms. Cardiovascular and neuromuscular symptoms were common in Group II.
• Adenomas were more prevalent in Group I (85%) than Group IIa (45%) and IIb (21%).
• Postoperative hypercalcemia was rare; recurrent laryngeal nerve paralysis rates were similar across groups.

Conclusions:

• Mandatory preoperative assessment of parathyroid function is recommended before thyroid operations.
• Many "asymptomatic" PHPT patients exhibit cardiovascular and neuromuscular symptoms.
• Simultaneous parathyroid exploration is advised for biochemically evident and borderline PHPT cases found during thyroid surgery.