Comparison of endoscopic ultrasonography‐guided fine‐needle aspiration cytology results with and without the stylet in 3364 cases
2013
Background and Aim
Endoscopic ultrasound-guided fine-needle aspiration cytology (EUS-FNA) is traditionally carried out with the
stylet, as it is believed to prevent blockage or contamination of the needle by tissue coming from the
gastrointestinal wall. However, this recommendation has not been demonstrated on an empirical basis. The aim of the present study was to compare the yield of EUS-FNA in a very large series of patients with (S+) and without (S–) the
stylet. Methods Until 2004, the
styletwas used for EUS-FNA in our center. After that, the
styletwas never used. The results of all EUS-FNA in solid lesions carried out by one endosonographer with the same needle type were compared before and after
styletuse was stopped. Results 3364 EUS-FNA procedures (in 3078 patients) in solid lesions were included (1483 S+ and 1881 S–). There was no significant difference between the S+ and S– results for any variable other than the number of passes required. The number of passes was significantly lower in the S– group when sampling lymph nodes, wall lesions and when carrying out biopsies through the gastric or rectal wall. However the statistical differences disappeared after controlling for malignancy, location and lesion size. Conclusion This very large comparative study showed no benefit in diagnostic yield when using the
styletfor EUS-FNA.
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