超声内镜引导下细针穿刺抽吸胰腺肿块的主要并发症发生率:一项前瞻性研究

Background:EUS-guided FNA is effective for establishing tissue diagnosis in suspected pancreatic cancer.However,data on the frequency of major complications following EUS-FNA are limited.Objective:To evaluate the frequency of major complications after EUS-FNA of solid pancreatic masses.Design:Prospective cohort study.Setting:Tertiary University based referral center for pancreatico-biliary disorder.Patients:Consecutive patients who underwent EUS-FNA of a solid pancreatic over a 42-month period.All immediate complications were recorded by the endosonographer.Late complications were assessed at 72 hours and at 30-days after the procedure.Main Outcomes Measurements:Major complications were defined as acute pancreatitis,bleeding,infection,perforation,use of reversal medication,hospitalization or death.Results:A total of 355 consecutive patients with a solid pancreatic mass underwent EUS-FNA.Major complications were encountered in 9 patients(2.54%,95%CI 1.17-4.76).Acute pancreatitis occurred in 3 of 355(0.85 %,95%CI 0.17-2.45);2 patients were hospitalized,and 1 patient recovered with outpatient analgesics.Three patients were admitted for severe pain after the procedure;all were treated with analgesics and subsequently discharged with no sequela.Two patients(0.56%,95%CI 0.07-2.02)developed fever and were admitted for intravenous antibiotics;1 patient recovered with intravenous antibiotics and the other required surgical debridement for necrosis.One patient required the use of reversal medication.Overall,1.97%(95%CI 0.80-4.02)of the patients were hospitalized for complications(range 1-16 days).None of the patients experienced clinically significant hemorrhage,perforation,or death.No clear predisposing risk factors were identified.Limitations:Lack of surgical gold standard and referral to a tertiary center.Conclusions:EUS-FNA of solid pancreatic masses infrequently leads to major complications.Our results can be used by endosonographers to counsel patients before EUS-FNA of solid pancreatic masses.

超声内镜引导胰腺实质性病变的细针穿刺:300例操作经验

Background: The objective of our study was to assess a single operator’s learning curve with regard to the number of passes, the diagnostic accuracy, and the complications associated with EUS-guided FNA (EUS-FNA) of solid pancreatic masses. Methods: The number of passes, the diagnostic accuracy, and the complication rate were prospectively evaluated in 300 consecutive EUS-FNA of solid pancreatic masses performed by a single endosonographer over a 3-year period. The procedures were placed into 3 groups,which contained 100 procedures each. The endosonographer had undergone a third-tier EUS fellowship and had performed 45 supervised pancreatic EUS-FNA during his training. Results: Of the 300 EUS-FNA performed (median age 63 years, 64%men), no statistically significant differences among the 3 groups with regard to age, gender, race, location, or size of the mass were found. Diagnostic accuracy of the EUS-FNA procedure was similar over time (Group 1, 92%; Group 2, 92%; Group 3, 95%). Median number of passes showed a decreasing trend over the 3-year study period, despite an increasing trend of the number of procedures performed (r = -0.14, p = 0.42). The median number of passes was lower for Group 2 (median, 3; p = 0.02) and Group 3 (median, 3; p = 0.003) compared with Group 1 (median, 4). Group 3 (7/100, 7%) was less likely to encounter complications compared with Group 1 (13/100, 13%; p = 0.24) and Group 2 (18/100, 18%; p = 0.03). Frequency of serious complications was similar across the 3 groups (1%-3%). Conclusions: With adequate third-tier training, a newly developed EUS program can achieve safe and accurate results of EUS-FNA of the pancreas. The learning curve, however, needs to continue after the fellowship, because more procedures are needed for one to gain proficiency and efficiency with EUS-FNA.

EUS引导下FNA结合流式细胞分析术诊断可疑性或复发性胸内或腹膜后淋巴瘤

Background: Limited data exist on the combined use of EUS guided FNA (EUS-FNA) and flow cytometry (FC) in the diagnosis of lymphoma. The aim of this study was to evaluate the accuracy of EUS-FNA combined with FC in the diagnosis of primary or recurrent lymphoma. Methods: This study was a retrospective analysis of a prospective collection of data over a 3-year period. Over 3 years, 29 patients with lesions (n = 31) suspicious for lymphoma underwent EUS-FNA and FC. Results: Of the 29 patients, 10 patients had lymphoma and 17 patients had nonlymphoma lesions; for two patients, final diagnosis was indeterminate because of insufficient material for FC. The lymphoma cases included non-Hodgkin’s lymphoma (n = 6, including 3 recurrences), mucosa-associated lymphoid tissue (MALT) lymphoma (n = 2), a non-GI lymphoma with mediastinal lymphadenopathy (n = 1), and an uncharacterized lymphoma (n = 1). Of the 31 lesions, 8 were true positive, 18 were true negative, and 3 were false negative; for two lesions, we could not determine the final diagnosis. No false-positive results were encountered. The sensitivity, the specificity, and the accuracy of EUS-FNA combined with FC for diagnosing lymphoma were 72.7% : 95% CI [43.3% , 90.3% ], 100% : 95% CI [82.4% , 100.0% ], and 89.7% : 95% CI [73.6% , 96.4% ], respectively. Limitations to this study include a short duration of follow-up and a lack of a surgical criterion standard. Conclusions: EUS-FNA in combination with FC allows the diagnosis of primary suspected or recurrent lymphoma. It also is an adjunct in staging MALT lymphoma and could direct clinicians toward further investigative procedures.