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J Korean Soc Radiol. 2018 Sep;79(3):129-138. English. Original Article. https://doi.org/10.3348/jksr.2018.79.3.129
Son IW , Lee JW , Jeong YJ , Kim A , Suh HB , Lee G .
Department of Radiology, Pusan National University Hospital, Busan, Korea. rabkingdom@naver.com
Medical Research Institute, Pusan National University Hospital, Busan, Korea.
Department of Pathology, Pusan National University Hospital, Busan, Korea.
Abstract

Purpose

We compared the outcomes of percutaneous transthoracic needle aspiration biopsy (PCNA) of lung masses in cases with and without prior positron emission tomography/computed tomography (PET/CT) information, and investigated the factors associated with false-negative pathological results.

Materials and Methods

From a total of 291 patients, 161 underwent PCNA without prior PET/CT imaging, while 130 underwent PET/CT before PCNA. Clinical characteristics, procedural variables, pathological results, and diagnostic success rates were compared between the 2 groups. Among patients with initial negative (non-specific benign) PCNA results, the radiological findings of these groups were compared to evaluate the predictors of false-negative lesions.

Results

No significant difference was found in the clinical characteristics, procedural characteristics, and pathological results of the 2 groups, nor was the diagnostic rate significantly different between them (p = 0.818). Among patients with initial negative PCNA results, radiological characteristics were similar in both the groups. In multivariate analysis, the presence of necrosis (p = 0.005) and ground-glass opacity (GGO) (p = 0.011) were the significant characteristics that indicated an increased probability of initial false-negative results in PCNA.

Conclusion

Routine PET/CT did not have any additional benefit in patients undergoing PCNA of lung masses. The presence of necrosis or GGO could indicate an increased probability of false-negative pathological results.

Copyright © 2019. Korean Association of Medical Journal Editors.