What is the pathophysiology of liver abscess?
The usual pathophysiology for pyogenic liver abscesses is bowel content leakage and peritonitis. Bacteria travel to the liver via the portal vein and resides there. Infection can also originate in the biliary system. Hematogenous spread is also a potential etiology.
Can MRI detect liver abscess?
Ultrasonography (US), computed tomography (CT), and magnetic resonance imaging allow accurate detection of most hepatic infections and, in some circumstances, may provide specific signs to identify the underlying pathogen and exclude other entities with similar imaging features.
How can you tell the difference between amoebic and pyogenic liver abscess?
Amebic abscesses are more common in areas where Entamoeba histolytica is endemic, whereas pyogenic abscesses are more common in developed countries. Pyogenic abscess severity is dependent on the bacterial source and the underlying condition of the patient.
What is the treatment of liver abscess?
When detected in time, liver abscess is usually treatable and often can be cured with a course of antibiotics or a combination of antibiotics and a surgical procedure to drain the abscess.
What are the complications of liver abscess?
Complications of liver abscess may include the following:
- Empyema resulting from contiguous spread or intrapleural rupture of abscess.
- Rupture of abscess with resulting peritonitis.
- Endophthalmitis when an abscess is associated with K pneumoniae bacteremia.
How is amoebic abscess diagnosed?
Tests that may be done include:
- Abdominal ultrasound.
- Abdominal CT scan or MRI.
- Complete blood count.
- Liver abscess aspiration to check for bacterial infection in the liver abscess.
- Liver scan.
- Liver function tests.
- Blood test for amebiasis.
- Stool testing for amebiasis.
How is dwi used to diagnose hepatic abscess?
Diagnostic performance (area under the ROC curve [Az]) of DWI in identifying hepatic abscess was 0.986 and 0.982 for each observer. Conclusion: In addition to conventional MRI, DWI is helpful in differentiating hepatic abscess from malignant mimickers.
How is diffusion weighted imaging used to diagnose hepatic abscess?
Conclusion: In addition to conventional MRI, DWI is helpful in differentiating hepatic abscess from malignant mimickers. Keywords: MRI; diffusion weighted imaging (DWI); hepatic abscess; malignant tumor. Copyright © 2013 Wiley Periodicals, Inc.
What kind of MR imaging is used for hepatic abscess?
Methods: DW MR imaging was performed in 18 patients who had liver masses with large cystic or necrotic cavities detected by computed tomography or ultrasonography. The final diagnoses were pyogenic abscess (five cases), fungal abscess (one), hepatocellular carcinoma (five), cystic metastasis (four), and hepatic cyst (three).
How is diffusion weighted MR of liver determined?
Liver DW MR imaging is routinely estimated by using tridirectional diffusion gradients along each of the three directions (x, y, and z), and the average diffusion-weighted image (trace) is evaluated.