Fig. 2From: Utility of routine ultrasonography follow-up after total thyroidectomy in patients with papillary thyroid carcinoma: a single-center studyDiagnostic performance of the number of sessions and interval of follow-up ultrasonography for detecting tumor recurrence/persistence after total thyroidectomy in patients with papillary thyroid carcinoma. The diagonal line indicates 50% of the area under the receiver operating characteristic curve and refers to a hypothetical marker that has no power for discriminating a tumor recurrence from a non-recurrenceBack to article page