“…Some authors suggested that FNA is valuable in patients who have a nondiagnostic Tc 99 -sestamibi scan, with multiple enlarged parathyroid glands, prior failed surgery, differentiating parathyroid adenomas from posterior thyroid nodules, atypical location, and nonfunctioning parathyroid incidentalomas (Abraham, Duick et al 2008;Vu and Erickson 2010). Cellular FNA specimens with features not typical for thyroid lesions should be triaged for PTH assay in the FNA rinse, which is useful to differentiate parathyroid lesions from thyroid lesions (Owens, Rekhtman et al 2008;Ciuni, Ciuni et al 2010;Lieu 2010). This technique is also used during operation (Lamont, McCarty et al 2005).…”