Clinical trial NCT03241797: Evaluation of EUS-guided FNA for Diagnosing Autoimmune Pancreatitis
Official title: Evaluation of EUS-guided FNA for Diagnosing Autoimmune Pancreatitis: a Prospective, Single-center Study
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Autoimmune Pancreatitis
Keywords: AIP
EUS-FNA
Lead sponsor: Huazhong University of Science and Technology
Sponsor class: OTHER
First posted: 2017-08-08
Enrollment: 27
Sex: ALL
Minimum age (years): 20
Maximum age (years): 85
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: DIAGNOSTIC

Brief summary: The aim is to evaluate EUS-FNA efficacy for AIP diagnosis using a 22-gauge (G) needle.

Detailed description: Patients who suggested having Autoimmune pancreatitis (AIP) and underwent endoscopic ultrasound-guided fine needle aspiration (EUS-FNA） by using a standard 22-gauge aspiration needle were enrolled between January 2013 and May 2017. The enrollment criteria included age greater than 20 years at the time of enrollment; presence of imaging characteristics of AIP, as specified in the International Consensus Diagnostic Criteria（ICDC） (diffuse or segmental/focal enlargement with delayed enhancement and diffuse or segmental/focal or multiple irregular narrowing of the main pancreatic duct without marked upstream dilatation) was confirmed by computed tomography (CT), magnetic resonance imaging (MRI), or EUS. The exclusion criteria were steroid administration within 3 months before the initiation of treatment; refusal or inability to provide informed consent; episode of acute pancreatitis in previous 2 weeks; inability to safely perform EUS-FNA, such as cardiorespiratory dysfunction, mental diseases, coagulopathy and drug addiction.All procedures were performed under deep sedation by a single experienced endosonographer who had performed more than 500 cases. EUS-FNA was performed by using Olympus linear echoendoscopes , Diagnostic Ultrasound System and 22-G needle . Once the lesion was evaluated by EUS, the echoendoscopist would select the shortest pathway, while avoiding blood vessels, to reach the lesion. Under real-time visualization, slow-pull technique and suction technique were used to punctured each lesions. The specimens were expelled onto glass slides, and then prepared for histological and cytological examinations. Because neither pathologists nor cytologists were present on-site at our institution, the puncture was repeated until a whitish material could be observed macroscopically.Tissue samples were fixed in formalin and embedded in paraffin. A paraffin block was thin cut into serial sections and stained with hematoxylin-eosin(H\&E). To detect infiltrated plasma cells, anti-IgG4 antibody would be done if necessary. The histologic analysis was made by an experienced pathologist who was blind to the kinds of studies referring to the histological criteria of the ICDC. The Lymphoplasmacytic sclerosing pancreatitis (LPSP ) findings are as follow: (1) Periductal lymphoplasmacytic infiltrate without granulocytic infiltration; (2) Obliterative phlebitis; (3)Storiform fibrosis; (4) Abundant (\>10cells/HPF) immunoglobulin G4 (IgG 4)positive cells. The level-1 criteria of LPSP were positive for 3 or more of the 4 LPSP findings, and the level-2 criteria were positive for 2 of the 4 items. The idiopathic duct-centric chronic pancreatitis (IDCP) findings are as follow: (1) Granulocytic infiltration of duct wall (GEL) with or without granulocytic acinar inflammation; (2)Granulocytic and lymphoplasmacytic acinar infiltrate; (3)Absent or scant (0-10 cells/ High-power fields) IgG4-positive cells. The level-1 criteria of IDCP were positive for items (1) and (3), and the level-2 criteria were positive for items (2) and (3).Statistical analyses were performed with Statistical Analysis System (SAS) version 9.2. All tests were 2-tailed and a P value of less than 0.05 was considered to indicate a statistically significant difference. All category variables will be described in terms of the count and percentage using the χ 2 test, whereas the continuous variables will be described as mean ± standard deviation using τ tests or Wilcoxon rank-sum tests. Outpatients were observed for immediate complications in the recovery room for 2 hours and followed up on the day after the procedure to monitor for possible complications.

Eligibility criteria: Inclusion Criteria:

* age \>20 years old, \<85 years old ; probable AIP.

Exclusion Criteria:

* steroid administration within 3 months before the initiation of treatment; refusal or inability to provide informed consent; acute pancreatitis in previous 2 weeks; cardiorespiratory dysfunction; mental diseases; coagulopathy; drug addiction(asprin, clopidogrel).

Primary outcomes:
measure: evaluate the diagnostic yield of AIP patients by EUS-FNA .
timeFrame: 52 months
Secondary outcomes:
Other outcomes:
Locations:
city: Wuhan
country: China
facility: Tongji hospital, Tongji Medical College, Huazhong University of Science and Technology
state: Hubei
Study officials:
affiliation: Tongji Hospital
name: Bin Cheng, Doctor
role: PRINCIPAL_INVESTIGATOR
affiliation: Tongji Hospital
name: Yun Wang, Doctor
role: STUDY_CHAIR
affiliation: Tongji Hospital
name: Li Cao, Doctor
role: STUDY_DIRECTOR
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