Article Figures & Data
Figures
- Fig 1.
Axial noncontrast (A), axial early phase postcontrast (B), and axial delayed phase postcontrast (C) images show a hypoattenuated hypodense nodule contiguous with the left posterior thyroid gland, which demonstrates avid early contrast enhancement and washout. Pathology revealed a 600-mg parathyroid adenoma.
- Fig 2.
Coronal early phase postcontrast (A), axial early phase postcontrast (B), and axial delayed phase postcontrast (C) images showing an early enhancing 1.3-cm nodule in the right tracheoesophageal groove, with modest contrast washout representing a right inferior parathyroid gland in an orthotopic location. Pathology demonstrated a 3-g parathyroid adenoma.
- Fig 3.
Axial (A) and coronal (B) postcontrast images showing an enhancing retrosternal ectopic parathyroid adenoma.
Tables
Variable Mean/Freq SD/Percent Age (yr) 59.3 9.9 Female gender (n) 26 74% BMI (kg/m2) 26.8 5.6 Weight (kg) 73.2 16.9 Lesion weight (mg) 566.7 611.0 Prior neck surgery (n) 2 6% Single-gland disease (n) 28 80% Multigland disease (n) 7 20% Peak preoperative parathyroid hormone (pg/mL) 190.3 288.6 Postoperative parathyroid hormone (pg/mL) 29.5 27.0 -
Note:—Freq indicates frequency.
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Variable Pathology Findings 4D-CT Findings Mean/Freq SD/Percent Mean/Freq SD/Percent Lesion detection Positive 27 100.0% 27 100.0% Negative 0 0.0% 0 0.0% Lesion location Right superior 6 22.2% 4 14.8% Right inferior 6 22.2% 8 29.6% Left superior 9 33.3% 8 29.6% Left inferior 6 22.2% 7 25.9% Lesion side Right 12 44.4% 12 44.4% Left 15 55.6% 15 55.6% Lesion z-axis Superior 15 55.6% 12 44.4% Inferior 12 44.4% 15 55.6% -
Note:—Freq indicates frequency.
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Measure %Rate Exact Binomial 95% CI Numerator Denominator Lower Upper Sensitivity 91.7 61.5 99.8 11 12 Specificity 93.3 68.1 99.8 14 15 PPV 91.7 61.5 99.8 11 12 PNV 93.3 68.1 99.8 14 15 Accuracy 92.6 75.7 99.1 25 27 CT Side Pathology Side Left Right Total Left 14 1 15 Right 1 11 12 Total 15 12 27 Measure %Rate Exact Binomial 95% CI Numerator Denominator Lower Upper Sensitivity 85.7 57.2 98.2 12 14 Specificity 100 71.5 100 11 11 PPV 100 73.5 100 12 12 PNV 84.6 54.6 98.1 11 13 Accuracy 92.0 74.0 99.0 23 25 CT Quadrant Pathology Quadrant Inferior Superior Total Inferior 11 2 13 Superior 0 12 12 Total 11 14 25 Measure %Rate Exact Binomial 95% CI Numerator Denominator Lower Upper Sensitivity 42.9 9.9 81.6 3 7 Specificity 100 87.7 100 28 28 PPV 100 29.2 100 3 3 PNV 87.5 71.0 96.5 28 32 Accuracy 88.6 73.3 96.8 31 35 CT Multigland Pathology Multigland No Yes Total No 28 4 32 Yes 0 3 3 Total 28 7 35
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