Hurthle cell predominance impacts results of Afirma gene expression classifier and ThyroSeq molecular panel performance in indeterminate thyroid nodules

Abstract

For ThyroSeq molecular panel, while it did not appear that there was an increase in rate of high-risk mutations detected in the samples with Hurthle cell predominance, small numbers limit the generalizability of these results. For the GEC cohort, indeterminate thyroid nodules with predominance of Hurthle cells showed an increased rate of "suspicious" results compared to samples without Hurthle cell predominance. The ROM for GEC "suspicious" nodules with Hurthle cell predominance on surgical resection was lower in our study. Repeat FNA may be of use in patients with these types of nodules. In the context of a Hurthle cell predominant lesion, positive results on molecular testing may not carry a high rate of malignancy.