Endoscopic Ultrasonography-guided Double Ethanol Lavage for Pancreatic Cysts: a Prospective Cohort Study

Study Overview
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Brief Summary
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Due to widespread use of cross-sectional imaging modalities, pancreatic cysts are common in abdominal image. These lesions encompass a wide spectrum, ranging from benign to malignant. The diagnosing specific type of cystic lesion is limited in spite of recent advances of diagnostic modalities. Surgical resection is generally recommended for malignant and potentially malignant lesions. However, surgical resection has significant morbidity and sometimes mortality. Recently, a few study of EUS-guided ethanol lavage for cystic tumors of the pancreas reported that complete resolution was achieved in only one-third of patients. Ethanol lavage of pancreatic cysts may be alternative method to surgical resection. The purpose of this study is the double ethanol lavage is a safe and effective method for treatment in those with the indeterminate pancreas cysts.

Official Title
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EUS-guided Double Ethanol Lavage for Pancreatic Cysts: a Prospective Cohort Study

Conditions
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Pancreatic Mucinous-Cystic Neoplasm

Intervention / Treatment
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* Drug: Endoscopic ultrasonography-guided double ethanol lavage


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients age 18 and older of any gender, ethnicity and race Voluntary enrollment and ability to give written informed consent Capable of safely undergoing endoscopy with deep sedation or general anesthesia Indeterminate cystic lesion which was diagnosed in cross-sectional image (CT and MRI) Pancreatic cystic lesion having uni- or oligo-locular (defined as having 2-6 locules within a cyst) and 2 4 cm in diameter Exclusion Criteria: Pancreatic cystic lesions which had the typical morphology of serous cystadenomas (i.e., honeycomb appearance) and pseudocysts (i.e., recent history of acute pancreatitis or parenchymal changes) Pancreatic cystic lesions having communication between the cystic lesion and the main pancreatic duct according to endoscopic retrograde cholangiopancreatography and magnetic resonance cholangiopancreatography Pancreatic cystic lesions having overt evidence of carcinomas, such as peripancreatic invasion Patients with a bleeding tendency (prothrombin time > 1.5 international normalized ratio [INR] or platelet count < 50,000/μL).

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 90 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: ethanol double lavage<br>Endoscopic ultrasonography-guided double ethanol lavage | Drug: Endoscopic ultrasonography-guided double ethanol lavage<br>* A radial echoendoscope and a 22 gauge needle were then used for cyst fluid aspiration and ethanol lavage. The 80 percent volume of cyst fluid was aspirated, and the pure ethanol was injected into the collapsed cyst until the original shape was restored. After 3-5 minutes, the reaspiration of the injected ethanol was then performed. The pure ethanol was reinjected into the collapsed cyst, followed by reaspiration of maximal possible volume for 3-5 minutes.<br>* Other names: Ethanol;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Rate of Subjects with Complete or Partial response of treatment | Complete or partial response of treatment will be defined by the presence of a treated cystic structure, and its volume and maximum diameter in cross-sectional imaging studies (CT, MR) | 1 year after final treatment | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Incidence rate of adverse events after treatment | Adverse events include pancreatitis, bleeding, perforation, any other occurrence resulting in hospitalization, medical treatment, surgery, death, or disability | 1 year after final treatment | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Cystic Tumors of the Pancreas, Endoscopic Ultrasound, Ethanol