Research Article: Diagnostic performance of 3T MRI preoperative localization of parathyroid adenomas in primary hyperparathyroidism
Abstract:
Preoperative localization is essential for the surgical management of primary hyperparathyroidism (PHPT). Ultrasound and 99mTc-sestamibi SPECT/CT are first-line imaging modalities, while MRI’s role is less defined. This study aimed to evaluate MRI for parathyroid adenoma localization in PHPT and compare it with that of ultrasound and SPECT/CT.
In this prospective single-center study, 103 adults with biochemically confirmed PHPT underwent ultrasound, multiparametric 3T MRI, and SPECT/CT before surgery. MRI examinations were independently evaluated independently evaluated by two blinded radiologists. Surgical and histopathological findings served as the reference standard.
Ninety-three patients (90%) had single-gland disease (SGD), and 10 (10%) multiglandular disease (MGD). MRI demonstrated high sensitivity for adenomas in SGD but significantly lower sensitivity in MGD: Reader 1, 0.824 vs 0.476 (p = 0.002) and Reader 2, 0.890 vs 0.524 (p < 0.001). Ultrasound and SPECT/CT showed similar patterns. Specificity did not differ significantly between SGD and MGD. Inter-reader agreement was high for MRI and ultrasound (Krippendorff’s ? > 0.8) but decreased when including SPECT/CT. MRI-based size lesion size measurements showed good concordance between readers (?C = 0.822) but showed low concordance with histology (?C1 = 0.498; ?C2 = 0.373) due to systematic underestimation (15–18%).
Multiparametric 3T MRI provides localization sensitivity to that of first-line imaging modalities in SGD, but differentiation between MGD and SGD remains challenging, with MRI showing no clear superiority over standard modalities.
Introduction:
Primary hyperparathyroidism (PHPT) is the third most common endocrine disorder (after diabetes and thyroid disease) characterized excessive or inappropriately normal parathyroid hormone secretion, usually resulting in hypercalcemia ( 1 ). Clinical manifestations of PHPT may include skeletal involvement, such as reduced bone mineral density and increased fracture risk, nephrolithiasis, nephrocalcinosis, gastrointestinal symptoms, and neuropsychiatric symptoms ( 2 ). PHPT is mostly caused by a solitary benign…
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