What clinical sign relates to discoloration around the umbilical area in suspected acute pancreatitis?

Cullen's sign is a clinical indicator that presents as a bluish discoloration around the umbilical area, and it is associated with conditions that lead to intra-abdominal bleeding, including acute pancreatitis. This discoloration results from the leakage of blood into the peritoneal cavity, which can occur in the context of pancreatic necrosis or hemorrhagic pancreatitis. The observation of Cullen's sign helps clinicians assess the severity of pancreatic inflammation and potential complications like hemorrhagic shock.

Grey Turner’s sign, though related to bleeding, is characterized by discoloration of the flanks rather than the umbilical area. Kehr’s sign, on the other hand, refers to referred pain in the shoulder due to irritation of the diaphragm, which is not indicative of an umbilical sign. McBurney’s point tenderness relates specifically to appendicitis, showing localized pain in the lower right abdomen. Thus, the presence of bluish discoloration around the umbilicus clearly points towards Cullen's sign as the relevant clinical finding in suspected acute pancreatitis.