Background: The impact of rapid on-site evaluation (ROSE) on thyroid aspirates has been a matter of extensive debate. In the current study, the authors reviewed all thyroid fine-needle aspiration biopsies (FNABs) performed in their service in recent years to evaluate the impact of ROSE on final adequacy and diagnostic rates.
Methods: All ultrasound-guided FNABs of the thyroid performed between July 2015 and July 2017 were included retrospectively. ROSE was performed by experienced cytopathologists, with production of Romanowsky-stained slides for immediate evaluation. When ROSE was not performed, a total of 3 needle passes were performed as the default. Final specimen adequacy and the risk of malignancy (ROM) of each The Bethesda System for Reporting Thyroid Cytopathology (TBSRTC) category were calculated in the 2 groups (ROSE and non-ROSE) and compared using the chi-square test.
Results: An initial search obtained 4649 cytology specimens, 3469 of which (74.6%) underwent ROSE and 1180 of which (25.4%) did not. Patients were predominantly female (85.4%), with a mean age of 53 years. Specimen adequacy was found to be significantly higher in the ROSE group (93.4% vs 69.4%; P<.0001), with a mean number of needle passes necessary for an adequate diagnosis of 1.48 ± 0.71 (median, 1.0 needle passes; range, 1-5 needle passes). No statistical difference was observed with regard to the ROM for each TBSRTC category when the 2 groups (ROSE and non-ROSE) were compared.
Conclusions: The current study data support ROSE as a valuable technique in thyroid FNAB. It was proven to significantly improve specimen adequacy with a decreased mean number of needle passes necessary to achieve an adequate cytological diagnosis and no impact on the ROM for any TBSRTC category.
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