Accuracy and Quality Assessment of EUS-FNA: A Single-Center Large Cohort of Biopsies
Table 3
nondiagnostic EUS-FNA cases.
Reason
Frequency
Percent of total
Number of FNA passes
3 passes
2
10.00
2 passes
5
25.00
1 pass
3
15.00
Not listed
10
50.00
Total
20
100.00
Other reasons
Unidentifiable cause
10
50.00
Minimal fluid withdrawn
8
40.00
Difficult to pass needle*
3
15.00
Suspected autoimmune or chronic inflammation
2
10.00
False negatives
8
40.00
Total
20
100.00
Sensitivity
83.3%
Specificity
100.00%
Positive predictive value
100.00%
Negative predictive value
91.6%
Accuracy
94.1%
Listed is a summary of suspected causes of nondiagnostic and false negative FNA cases, along with sensitivity, specificity, PPV, NPV, and overall accuracy of EUS-FNA. The category labeled “difficult to pass needle” is a subgroup of the cases that fall under the group “minimal fluid withdrawn.”