Fig 1: showing bulge in D1 during UGI endoscopy.

The contrast-enhanced computed tomography (CECT) of the abdomen revealed findings consistent with acute interstitial pancreatitis, accompanied by a pancreatic pseudocyst measuring 19x9.5x5.8 cm. The pseudocyst was located in the lesser sac region and extended into the left anterior pararenal area and the right mesentery. Additionally, there was a heterogeneously enhancing asymmetric soft tissue thickening measuring approximately 2.7x1.9 cm, originating from the posterior wall of the body of the gallbladder (Figure 2 and 3).