[Thin-needle aspiration biopsy in the preoperative diagnosis of non-toxic nodular goiter].

: The ascertainment of diagnostic reliability of fine needle aspiration biopsy in preoperative examination of non-toxic goitres is performed by comparing its results with the findings of the definitive histologic examination. The set of patients did not include those with the cytological finding of Hurtle tumour for the impossibility to distinguish between adenomas and carcinomas from oxyphilic cells by means of cytologic examination. Aspirates were stained by May, Grunwald and Giemsa method. Histologic results were gained from 185 patients. Cytologic findings were considered as benign in 95 cases (however 3 cases of cancer were revealed by the histologist--false negativity). In 90 cases, atypia, findings of suspectivity, or diagnosis of malignity were described, however the histologist evaluated 49 cases of goitres as being benign (false positivity). Totally 44 cases of malignant tumours were histologically diagnosed. Diagnostic sensitivity in our set of patients was 0.97 and diagnostic specificity was 0.46. In accordance with the available literature, fine needle cytodiagnosis is considered to represent an appropriate screening method in the process of decision as to whether conservative or surgical therapy with histologic verification in patients with non-toxic nodular goitres is to be indicated. (Tab. 1, Ref. 6.).