Abstract:
BACKGROUND AND STUDY AIMS:Both endoscopic ultrasound- (EUS-) guided tissue sampling techniques, fine-needle aspiration (FNA) and Trucut biopsy, have advantages and limitations. The aim of this study was to develop a strategy of combining these two EUS-guided sampling techniques in order to maximize the diagnostic accuracy and minimize duplication. PATIENTS AND METHODS:In this multicenter study we performed "dual sampling" (i. e. with both FNA and Trucut biopsy) in 95 patients during phase 1 of the study and "sequential sampling" (i. e. performing FNA only when Trucut biopsy tissue cores were macroscopically inadequate) in 72 patients during phase 2. RESULTS:During the study period, 167/401 patients referred for EUS-guided sampling were eligible for the study; only solid lesions were included. In 143/167 patients (86 %), sampling was performed via the transesophageal or transgastric routes. When the dual sampling strategy was used, an accurate diagnosis was achieved in 78/95 patients by FNA, compared with 85/95 by Trucut biopsy ( P = 0.21). The combined accuracy of the dual sampling strategy was higher than FNA alone (88/95 vs. 78/95, P = 0.048), but was not significantly higher than Trucut biopsy alone (88/95 vs. 85/95, P = 0.61). Using the sequential sampling strategy, an accurate diagnosis was achieved in 66/72 patients (92 %) compared with 88/95 (93 %) for dual sampling ( P = 1.0), and 8/72 patients (11 %) had to undergo FNA after Trucut biopsy failed to obtain an adequate sample. One patient with mediastinal tuberculosis developed a cold abscess following Trucut biopsy. CONCLUSION:A sequential sampling strategy, in which EUS-guided Trucut biopsy is attempted first, and FNA performed only when Trucut biopsy fails to obtain a macroscopically adequate sample, achieves a diagnostic accuracy of 92 %, with 11 % of patients requiring both sampling procedures.
journal_name
Endoscopyjournal_title
Endoscopyauthors
Aithal GP,Anagnostopoulos GK,Tam W,Dean J,Zaitoun A,Kocjan G,Ragunath K,Pereira SPdoi
10.1055/s-2007-966400subject
Has Abstractpub_date
2007-08-01 00:00:00pages
725-30issue
8eissn
0013-726Xissn
1438-8812journal_volume
39pub_type
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