¹⁸F-choline PET/4D CT in hyperparathyroidism: correlation between biochemical data and study parameters.

Hyperparathyroidism is a condition marked by elevated parathyroid hormone levels, often requiring surgical intervention. While ultrasound and Tc-99m MIBI scintigraphy are first-line diagnostic tools, they may fail to provide precise localization. This uncertainty can lead to unnecessary surgical exploration or repeated procedures. Prior research has shown that these imaging modalities have limitations in detecting parathyroid pathology when results are inconclusive. No prior work had resolved how to best improve diagnostic accuracy in such cases. That uncertainty drove the need for more advanced imaging techniques. Researchers have proposed that functional imaging could offer better localization and characterization of parathyroid glands. However, the relationship between biochemical markers and imaging parameters remains unclear. This gap motivated the exploration of 18F-choline PET/4D CT as a potential solution. The study aimed to address this by evaluating its diagnostic performance and correlations with clinical data.

The study aimed to assess the sensitivity of 18F-choline PET/4D CT in diagnosing parathyroid disease in patients with hyperparathyroidism. It also sought to determine if preoperative parathyroid hormone levels correlate with lesion size and uptake values measured by the imaging technique. Another objective was to evaluate how parathyroid lesions behave under intravenous contrast administration. The motivation for this work stems from the limitations of current diagnostic methods in accurately identifying glandular pathology. The researchers propose that a more precise imaging approach could reduce the need for exploratory surgery. This approach could also help guide minimally invasive surgical strategies. The study focused on patients with inconclusive first-line imaging findings. By analyzing correlations between biochemical and imaging data, the researchers aimed to improve preoperative planning.

The study included 28 patients with hyperparathyroidism who underwent 18F-choline PET/4D CT imaging. A prospective observational cohort design was used at a single institution between 2016 and 2019. Correlation analyses were performed using Pearson’s coefficient for normally distributed variables and Spearman’s rho for non-normal data. Anatomopathological findings were used as the reference standard to determine diagnostic sensitivity. The study evaluated lesion size, uptake values, and contrast enhancement patterns. Patients who underwent surgery provided histological confirmation of imaging findings. Statistical significance was defined as p < 0.05. Data were analyzed using STATA 13 software to assess correlations and sensitivity metrics.

Out of 28 patients, 18 underwent surgery, and 26 lesions were identified as parathyroid-related by 18F-choline PET/4D CT. Of these, 23 were confirmed as parathyroid disease (adenoma or hyperplasia), yielding a sensitivity of 88.5%. Preoperative parathyroid hormone levels correlated with the maximum gland size on imaging (Spearman = 0.66; p = 0.0014). Lesions exhibited distinct enhancement patterns after intravenous contrast administration. These patterns were highly suggestive of parathyroid pathology. The study found no significant correlation between calcaemia and lesion size or uptake values. The imaging technique demonstrated both anatomical and functional diagnostic capabilities. These findings suggest that 18F-choline PET/4D CT could serve as a valuable diagnostic tool in hyperparathyroidism.

The authors propose that 18F-choline PET/4D CT is a sensitive diagnostic tool for hyperparathyroidism when first-line studies are inconclusive. The study suggests a correlation between preoperative parathyroid hormone levels and lesion size on imaging. Parathyroid lesions showed distinct enhancement patterns after contrast administration, which were highly suggestive of pathology. These findings support the use of this imaging technique in preoperative planning. The authors suggest that this approach may reduce the need for exploratory surgery. The study did not establish causality but highlights the potential of functional imaging in this context. No prior work had resolved how to best integrate imaging and biochemical data in hyperparathyroidism. The authors propose that further research could explore broader applications of this technique.