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Differentiation of pyogenic from amebic hepatic abscesses
Abstract:
Recent immigration trends have resulted in an increased prevalence of amebic hepatic abscesses in southern states and in many northern American cities. Because amebic hepatic abscesses generally do not require drainage, differentiation from pyogenic hepatic abscesses is important. We, therefore, reviewed the records of patients admitted to the UCLA Medical Center from 1968 through 1983 to compare the clinical manifestations and to access the results of treatment of pyogenic and amebic hepatic abscesses. During this 15 year period, 82 patients (42 pyogenic and 40 amebic) with hepatic abscesses were admitted. Factors which distinguished patients with pyogenic abscesses included: age greater than 50 years; jaundice; pruritus; sepsis and shock; a palpable mass; elevated bilirubin level; elevated alkaline phosphatase level, and abnormal abdominal roentgenograms. Patients with amebic abscesses of the liver were more likely to have Mexican ancestry, recently traveled to an endemic area, abdominal pain, diarrhea, abdominal tenderness, hepatomegaly and positive amebic serology. Hepatic scans and ultrasonography were excellent methods of detecting the presence of but not the type of hepatic abscess. Over-all, the mortality was 40 per cent for patients with pyogenic abscesses whereas all 40 of the patients with an amebic abscess survived. However, operative mortality was only 4.5 per cent for the 22 patients with pyogenic abscess who were managed with systemic antibiotics and surgical drainage. We conclude that many clinical and laboratory parameters can aid in the differentiation and, as a result, management of patients with pyogenic and amebic hepatic abscesses.
Insights
Differentiating amebic hepatic abscesses from pyogenic ones is crucial for treatment. Amebic abscesses, often linked to travel, have distinct symptoms and better outcomes than pyogenic abscesses.
Area of Science:
- Hepatology
- Infectious Diseases
- Clinical Medicine
Background:
- Increasing prevalence of amebic hepatic abscesses due to immigration.
- Importance of differentiating amebic from pyogenic hepatic abscesses due to differing management.
- Hepatic abscesses present a significant clinical challenge.
Purpose of the Study:
- To compare clinical manifestations and treatment outcomes of pyogenic and amebic hepatic abscesses.
- To identify factors distinguishing between the two types of hepatic abscesses.
- To inform clinical management strategies for hepatic abscesses.
Main Methods:
- Retrospective review of 82 patients (42 pyogenic, 40 amebic) admitted to UCLA Medical Center from 1968-1983.
- Analysis of clinical symptoms, laboratory results, and diagnostic imaging (hepatic scans, ultrasonography).
- Comparison of treatment outcomes, including mortality rates.
Main Results:
- Pyogenic abscesses associated with age >50, jaundice, elevated bilirubin/alkaline phosphatase, sepsis, and abnormal imaging.
- Amebic abscesses linked to Mexican ancestry, travel to endemic areas, diarrhea, hepatomegaly, and positive serology.
- Overall mortality: 40% for pyogenic vs. 0% for amebic; operative mortality for pyogenic abscesses managed with antibiotics/drainage was 4.5%.
Conclusions:
- Clinical and laboratory parameters effectively differentiate amebic from pyogenic hepatic abscesses.
- Accurate differentiation aids in appropriate patient management and improves outcomes.
- Amebic hepatic abscesses have a significantly better prognosis than pyogenic hepatic abscesses.