Cullen sign refers to superficial oedema visible as periumbilical discolouration and is most commonly seen in patients with acute pancreatitis 1-3.
Clinical presentation
Clinically patients with pancreatitis present with epigastric pain that radiates to the umbilical/periumbilical region and then to the whole abdomen. On clinical examination, they may have a tender, tense distended abdomen and, if the Cullen sign is present, brown/blue discolouration of the dermis around the umbilicus 2,3,5.
History and etymology
The sign was first described by Thomas Stephen Cullen (1868-1953) a Canadian-American gynaecologist who first described the sign in a patient with a ruptured ectopic pregnancy 7.