J Korean Radiol Soc.  1995 Mar;32(3):411-415. 10.3348/jkrs.1995.32.3.411.

Percutaneous Fine Needle Aspiration of Chest Lesions: "Negative for Malignancy" in Cytopathology Means Benign?

• Kim JE
• Han H
• Song IH
• Hwang HY
• Kim HS
• Lee YS

• KMID: 2465315
• DOI: http://doi.org/10.3348/jkrs.1995.32.3.411

Abstract

PURPOSE
PCNA has been widely used because it is highly accurate, relatively simple and safe to administer. Regardless of its high diagnostic rate, PCNA has the difficulty in excluding malignancy in the cases of, negative for malignancy" results in PCNA cytologic reports. So, we analysed PCNA cases to evaluate the clinical outcome of "negative for malignancy" results in PCNA cytologic reports.
MATERIALS AND METHODS
PCNA in 170 cases were done between January, 1991 and December, 1993 and the diagnosis was malignancy in 86 cases, specific benign disease in 30 cases, "negative for malignancy" in 45 cases and inadequate sample in 9 cases. We analysed 36 cases among 45 cases of "negative for malignancy"
results
in cytologic examinations. The final diagnosis was made on the basis of histopathologic examinations, radiologic findings and clinical courses. we compared the final diagnosis to the radiologic diagnosis.
RESULTS
Of the 36 cases with initial "negative for malignancy" results, the final diagnosis was benign in 30 cases and malignant in 6 cases(17%). In radiologic diagnosis of the malignancy, "positive predictive value" was 42%, "negative predictive value" was 96%, and accuracy was 78%.
CONCLUSION
In the cases of PCNA results of "negative for malignancy", malignancy can not be excluded because 17% of the cases are proved to be malignant. And if malignancy is highly suggested at radiologic examination, the possibility of malignancy is 42%, and so intensive follow-up examination is needed.

MeSH Terms

Biopsy, Fine-Needle*
Diagnosis
Follow-Up Studies
Proliferating Cell Nuclear Antigen
Thorax*
Proliferating Cell Nuclear Antigen