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Minimal fluid withdrawn	8	40.00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∗The category labeled “difficult to pass needle” is a subgroup of the cases that fall under the group “minimal fluid withdrawn.”