[Image diagnosis of hyperparathyroidism].

Area of Science:

• Endocrinology
• Radiology
• Surgical Diagnosis

Background:

• Hyperparathyroidism diagnosis requires precise localization of abnormal parathyroid glands.
• Imaging modalities play a crucial role in pre-operative assessment for both primary and secondary hyperparathyroidism.

Purpose of the Study:

• To evaluate the diagnostic accuracy of computed tomography (CT), ultrasonography, and scintigraphy in localizing parathyroid glands for primary and secondary hyperparathyroidism.
• To compare the effectiveness of individual imaging techniques and their combinations.

Main Methods:

• Retrospective analysis of 14 patients diagnosed with hyperparathyroidism (8 primary, 6 secondary) between 1983 and 1988.
• Utilized computed tomography (CT), ultrasonography, and scintigraphy (Tc-99m and Tl-201 subtraction technique) for image diagnosis.
• Operative confirmation of diagnosis for all patients.

Main Results:

• For primary hyperparathyroidism, CT and scintigraphy achieved 100% localization accuracy, while ultrasonography was 87.5% accurate. The combination of all three methods yielded 100% accuracy.
• For secondary hyperparathyroidism, CT and ultrasonography showed 68% accuracy, scintigraphy 36% accuracy, and the combination of methods 84% accuracy.
• Ultrasonography and CT were effective for small abnormal glands; scintigraphy's accuracy was reduced in secondary cases due to uneven gland hypertrophy.

Conclusions:

• CT and ultrasonography are valuable for imaging small parathyroid glands in hyperparathyroidism.
• Scintigraphy demonstrates limited accuracy in secondary hyperparathyroidism, potentially due to radionuclide uptake patterns in enlarged glands.
• Combined imaging approaches offer high diagnostic accuracy for primary hyperparathyroidism.