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Table 5 Diagnostic parameters for PTC

From: Ultrasound criteria for risk stratification of thyroid nodules in the previously iodine deficient area of Austria - a single centre, retrospective analysis

PTC Sensitivity Specificity PPV NPV
Mild Hypoechogenicity 38% 61% 24% 76%
Marked hypoechogenicity 44% 82% 44% 82%
Microlobulated/ irregular margins 60% 73% 41% 85%
Microcalcifications 33% 93% 60% 82%
Taller than wide 33% 88% 47% 81%
No thin halo 89% 30% 29% 90%