hämorrhagische Pankreatitis

Hemorrhagic pancreatitis is characterized by bleeding within or around the pancreas, and is usually considered a late sequela of acute pancreatitis.

Pathology

Hemorrhage can occur in patients with severe necrotizing pancreatitis or as a result of pancreatic pseudoaneurysm rupture when it constitutes a life-threatening emergency.

Etiology

According to one study, the usual causes of hemorrhage were :

• bleeding pancreatic pseudoaneurysm or peripancreatic pseudoaneurysm: ~60%
• diffuse bleeding with pancreatic necrosis: ~20%
• hemorrhagic pancreatic pseudocysts: ~20%

Radiographic features

CT

Acute hemorrhage typically has high attenuation on unenhanced CT scans. The attenuation value then decreases as the hematoma ages through time .

MRI

Hemorrhagic fluid collections are more evident on MRI than CT due to the following reasons :

• T1: high-signal intensity methemoglobin 
• T2: low-signal intensity hemosiderin rim

Signal abnormalities due to hemorrhage remain visible longer on MRI than on CT.

Siehe auch:

• Pankreatitis
• eingeblutete Pankreaspseudozyste
• Akute Pankreatitis
• nekrotisierende Pankreatitis
• pancreatic hemorrhage

und weiter:

• Formen der akuten Pankreatitis
• Haemoperitoneum