The Revised Atlanta Criteria can be used to diagnose and classify acute pancreatitis based on morphology and timing of peripancreatic fluid collection development (Colvin et al., Abdom Radiol (NY) 45(5):1222–1231, 2020). Peripancreatic fluid collections in interstitial edematous pancreatitis are classified as before and after 4 weeks of onset of pancreatitis. Prior to 4 weeks, these are termed acute peripancreatic fluid collections and after, as pseudocysts. The majority of acute peripancreatic fluid collections are asymptomatic and resolve spontaneously within 1–2 weeks. However, those that persist >4 weeks form mature, encapsulated collections termed pseudocysts. Treatment of pseudocysts depends on the size, location, proximity to the main pancreatic duct, and underlying pancreatitis etiology (Aghdassi et al., HPB (Oxford) 8(6):432–441, 2006). Treatment options for drainage of pseudocysts include creation of fistula between the cyst and an enteric organ, e.g., stomach, small bowel, either operatively or endoscopically. Percutaneous drainage is not recommended due to high complication risk (Tan et al., Exp Ther Med 21(2):159, 2021).