Periumbilical blue-black discoloration, which follows intraperitoneal haemorrhage by 24–48 hours and may be caused by ectopic pregnancy (described by T.S. Cullen in 1916), acute pancreatitis, ruptured triple A, and other causes of retroperitoneal or intraabdominal haemorrhage
blue belly
Cullen sign Periumbilical bluish discoloration due to intraperitoneal hemorrhage, seen in acute pancreatitis.