Malignancy rate of thyroid nodules with architectural atypia.

<p>(<b>A</b>) The malignancy rate was estimated to be 7–35% in AUS-A nodules and 28–49% in FN/SFN nodules. (<b>B</b>) After reclassification of follicular variant papillary thyroid carcinomas to non-invasive thyroid neoplasm with papillary-like nuclear features, the malignancy rate was estimated to be 5–24% in AUS-A nodules and 23–39% in FN/SFN nodules. (AUS-A, atypia of undetermined significance with architectural atypia; FN/SFN, follicular neoplasm/suspicious for a follicular neoplasm).