In patients with severe pancreatitis, physical examination may reveal abdominal distension with tympanic percussion sounds, prominent tenderness in the upper middle abdomen, and potentially widespread abdominal pain centered in the upper middle area. Some may exhibit rebound tenderness, moderate muscle tension is common, and a few cases may demonstrate shifting dullness. Occasionally, a mass in the upper middle abdomen can be palpated, possibly due to fluid in the lesser sac. Auscultation may reveal diminished or absent bowel sounds, accompanied by cessation of passing gas or stool, indicating features of paralytic ileus.