Cullen sign and Grey Turner sign represent classic, highly specific cutaneous manifestations of severe intra-abdominal pathology, most prominently acute necrotizing pancreatitis and retroperitoneal hemorrhage 1,2. Cullen sign is clinically defined as superficial edema and bruising in the subcutaneous fatty tissue around the periumbilical region, while Grey Turner sign manifests as symmetrical discoloration of the flanks. Both signs arise from the tracking of retroperitoneal blood, necrotic exudate, and degraded hemoglobin breakdown products along specific anatomical fascial pathways toward the anterior and lateral abdominal walls. Although historically taught as hallmark indicators of severe hemorrhagic pancreatitis, these physical examination findings are clinically rare—manifesting in less than 1% of cases—yet carry profound prognostic significance when present, typically signaling severe disease progression, high rates of local complications, and elevated mortality 1,2.

1. Etiology & Risk Factors

  • Acute Necrotizing Pancreatitis: The most frequent classical etiology, driven by gallstone impaction, severe chronic alcoholism, hypertriglyceridemia, or post-endoscopic retrograde cholangiopancreatography (ERCP) trauma leading to enzymatic autodigestion of the pancreas and surrounding retroperitoneum 1,2.
  • Vascular Emergencies: Ruptured abdominal aortic aneurysm (AAA) or retroperitoneal hematoma secondary to anticoagulant therapy, coagulopathy, or blunt abdominal trauma.
  • Gynecological and Obstetrical Causes: Ruptured ectopic pregnancy with massive hemoperitoneum dissecting into the extraperitoneal spaces, or spontaneous retroperitoneal hemorrhage during anticoagulation in pregnancy.
  • Malignancies and Infarctions: Spontaneous rupture of hepatocellular carcinoma, retroperitoneal sarcoma, massive splenic infarction, or perforated duodenal ulcer eroding into the gastroduodenal or splenic artery.
  • Coagulopathies: Severe liver failure, disseminated intravascular coagulation (DIC), or therapeutic thrombolysis accelerating spontaneous vessel rupture within the retroperitoneal compartment.

2. Pathophysiology

The pathophysiological cascade begins with severe pancreatic parenchymal necrosis or retroperitoneal vascular disruption. In acute pancreatitis, the premature activation of pancreatic digestive enzymes—specifically trypsinogen, elastase, and phospholipase A2—leads to enzymatic fat necrosis of the peripancreatic adipose tissue and digestion of small retroperitoneal blood vessel walls. As vascular integrity fails, hemorrhagic exudate accumulates within the lesser sac and deep retroperitoneal fascial planes. This blood undergoes hemolysis, and hemoglobin is enzymatically converted into methemoglobin and methemalbumin. Driven by gravity and intra-abdominal pressure gradients, this dark, degraded blood tracks along natural fascial corridors: along the falciform ligament and round ligament of the liver to reach the subcutaneous umbilicus (producing Cullen sign), or laterally along the lateroconal fascia and transversalis fascia to the lateral abdominal wall and flanks (producing Grey Turner sign). The process is indolent, which explains the delayed clinical appearance typically seen 24 to 72 hours after the initial insult 1,2.

Cullen sign and Grey Turner sign — Pathophysiological Cascade & Clinical Flowchart 1 Trigger / Primary Insult Severe acute necrotizing pancreatitis or retroperitoneal vascular rupture causing enzymatic fat necrosis and vessel erosion 2 Cellular / Pathophysiological Cascade Release of active pancreatic proteases (elastase, trypsin) degrading retroperitoneal fat, fascia, and vascular walls 3 Target Organ / Structural Change Tracking of extravasated blood and methemalbumin along fascial planes, retroperitoneal spaces, and falciform ligament 4 Hallmark Clinical & Diagnostic Manifestation Appearance of bluish-purple discoloration around the umbilicus (Cullen sign) or along the flanks (Grey Turner sign) 5 Complications if Untreated & Therapeutic Target Systemic inflammatory response syndrome (SIRS), multi-organ failure, and death managed via intensive supportive care

3. Clinical Presentation & Classic Clinical Signs

  • History & Cardinal Symptoms: Patients typically present with sudden-onset, severe, constant epigastric or periumbilical abdominal pain that radiates straight through to the back in a "boring" fashion. This is invariably accompanied by intractable nausea, repeated episodes of non-bilious vomiting, profound weakness, and apprehension. A detailed history often reveals known biliary disease, heavy alcohol intake, recent hyperlipidemia, or anticoagulant usage.
  • Physical Examination & Named Clinical Signs: Examination reveals marked abdominal tenderness upon light palpation, often disproportionate to initial soft findings, along with diminished or absent bowel sounds indicating adynamic ileus. Patients may exhibit a low-grade or high fever, tachycardia, tachypnea, and hypotension reflecting systemic inflammatory response syndrome (SIRS) or third-spacing hypovolemia. Inspection of the abdomen reveals Cullen sign (blue-purple discoloration of the skin surrounding the umbilicus due to blood tracking via the falciform ligament) and Grey Turner sign (discoloration along the flanks, particularly between the 12th rib and the iliac crest). Additional rare eponyms such as Fox sign (bruising over Poupart's ligament) or Bryant sign may occasionally be observed.

4. Diagnostic Workup & Interpretation (Laboratory, Imaging & ECG/Pathology)

Diagnostic Modality / Test Expected Clinical & Radiological / Laboratory Finding
Gold-Standard InvestigationContrast-enhanced computed tomography (CECT) of the abdomen and pelvis demonstrating pancreatic non-enhancement (necrosis), peripancreatic fluid collections, retroperitoneal stranding, and active hemorrhage or pseudoaneurysm formation.
Laboratory PanelSerum amylase and lipase elevated to greater than 3 times the upper limit of normal; complete blood count showing hemoconcentration (hematocrit greater than 44%) and leukocytosis (WBC greater than 16,000/mcL); comprehensive metabolic panel revealing hypocalcemia, azotemia (elevated BUN and creatinine), hyperglycemia, and elevated liver function tests (suggesting a biliary etiology).
Imaging / Radiology (X-ray, US, CT, MRI)Abdominal ultrasound demonstrating gallstones, biliary ductal dilation, or an obscured pancreas due to overlying bowel gas; abdominal radiographs showing a "sentinel loop" or "colon cutoff sign"; magnetic resonance cholangiopancreatography (MRCP) utilized if contrast is contraindicated.
ECG / Histopathology / ProceduralElectrocardiogram performed routinely to rule out acute inferior myocardial infarction masquerading as acute epigastric pain; histopathology of pancreatic tissue showing extensive acinar cell necrosis, fat necrosis, and acute neutrophilic infiltration.

5. Staging, Classification & Clinical Scoring Systems

Criterion / Stage / Score Component Clinical Threshold, Points & Management Implication
Atlanta Classification (2012)Categorizes acute pancreatitis into mild, moderately severe, and severe forms based on the presence of local or systemic complications and transient or persistent organ failure (greater than 48 hours).
Ranson Criteria (Admission)Age greater than 55 years, WBC greater than 16,000/mcL, blood glucose greater than 200 mg/dL, serum LDH greater than 275 IU/L, and AST greater than 250 IU/L. Score of 3 or greater predicts severe pancreatitis requiring ICU admission.
Ranson Criteria (48 Hours)Hematocrit drop greater than 10%, BUN rise greater than 5 mg/dL, serum calcium less than 8.0 mg/dL, arterial pO2 less than 60 mmHg, base deficit greater than 4 mEq/L, and fluid sequestration greater than 6 L.
CT Severity Index (Balthazar CTSI)Grading from A to E based on pancreatic inflammation combined with the extent of pancreatic necrosis (0 to 10 points). A score greater than 6 correlates with significantly higher morbidity and mortality.

6. Differential Diagnosis

Differential Condition Distinguishing Clinical, Biochemical & Imaging Features
Ruptured Abdominal Aortic Aneurysm (AAA)Presents with acute abdominal or back pain, pulsatile abdominal mass, and hemodynamic instability; CECT confirms a widened aorta with retroperitoneal hematoma without pancreatic inflammation.
Ruptured Ectopic PregnancyOccurs in women of childbearing age with lower abdominal pain and vaginal bleeding; positive serum beta-hCG and transvaginal ultrasound demonstrating adnexal mass and free fluid in the pouch of Douglas.
Mesenteric IschemiaCharacterized by disproportionate severe abdominal pain out of physical examination findings, often in patients with cardiovascular risk factors; CT angiography reveals occlusion of the superior mesenteric artery or vein.
Perforated Peptic UlcerPresents with sudden onset of excruciating generalized abdominal pain, rigid "board-like" abdomen, and pneumoperitoneum visible as free air under the diaphragm on upright chest or abdominal X-ray.

7. Management & Treatment Protocol

  • Initial Stabilization & Resuscitation: Immediate admission to an intensive care unit (ICU) or high-dependency unit. Implement goal-directed fluid therapy with balanced crystalloids (e.g., lactated Ringer's solution) administered at 5–10 mL/kg/h for the first 12–24 hours, guided by frequent monitoring of vital signs, urine output (greater than 0.5 mL/kg/h), and serial hematocrit levels. Avoid over-resuscitation to prevent abdominal compartment syndrome and pulmonary edema.
  • First-Line Medical / Pharmacological Therapy (with exact adult dosing): Provide aggressive multimodal analgesia utilizing intravenous opioids (e.g., Hydromorphone 0.5–1.5 mg IV every 3–4 hours PRN or Fentanyl infusion). Maintain strict nil per os (NPO) status initially, but initiate early enteral nutrition via a nasoenteric or nasogastric tube within 24–48 hours to preserve gut mucosal integrity and reduce infectious complications. Prophylactic systemic antibiotics are not recommended for sterile necrosis but are indicated for confirmed extrapancreatic infections (e.g., cholangitis, pneumonia, urinary tract infection) using broad-spectrum agents such as Meropenem 1 g IV every 8 hours.
  • Surgical / Interventional Indications: Urgent therapeutic ERCP within 24 hours for patients with acute pancreatitis complicated by acute cholangitis or biliary obstruction. Interventional radiology-guided percutaneous catheter drainage or minimally invasive step-up surgical necrosectomy is reserved for infected pancreatic necrosis or sterile necrosis causing persistent clinical deterioration after 4 weeks.

8. Complications & Prognosis

  • Systemic Complications: Persistent systemic inflammatory response syndrome (SIRS) progressing to multi-organ dysfunction syndrome (MODS), acute respiratory distress syndrome (ARDS), acute kidney injury (AKI) requiring renal replacement therapy, and disseminated intravascular coagulation (DIC) 1,3.
  • Local Complications: Infected pancreatic necrosis, walled-off pancreatic necrosis (WOPN), pancreatic pseudocysts, splenic vein thrombosis, and pseudoaneurysm rupture leading to massive gastrointestinal or retroperitoneal hemorrhage 1,3.
  • Prognosis: The appearance of Cullen or Grey Turner sign historically indicates a severe necrotizing process with an overall mortality rate ranging from 10% to over 40%, particularly when complicated by secondary bacterial infection and multiorgan failure 1,3.