Pyogenic liver abscess: changing epidemiology and prognosis

Area of Science:

• Hepatology
• Infectious Diseases
• Radiology

Background:

• Pyogenic liver abscess (PLA) is a serious condition with historically high mortality.
• Previous studies indicated specific predisposing factors and diagnostic challenges.
• The evolution of diagnostic and treatment strategies necessitates updated clinical insights.

Purpose of the Study:

• To review the clinical features, diagnostic methods, and outcomes of pyogenic liver abscess patients.
• To identify distinct patient groups and their associated prognoses.
• To assess the impact of modern diagnostic techniques on PLA management.

Main Methods:

• Retrospective review of 31 patients diagnosed with pyogenic liver abscess between 1973 and 1980.
• Categorization of patients into primary abscess (Group 1) and abscess secondary to sepsis/malignancy (Group 2).
• Analysis of clinical presentation, diagnostic modalities, and patient outcomes.

Main Results:

• Two groups identified: 25 patients with primary PLA (Group 1) and 6 with secondary abscesses (Group 2).
• Group 1 experienced 0% mortality, while Group 2 had 100% mortality.
• PLA is increasingly seen in older adults, often without identifiable predisposing factors.
• Noninvasive imaging techniques facilitated diagnosis, correlating with improved prognosis.

Conclusions:

• Pyogenic liver abscess in older adults is increasingly diagnosed early via noninvasive imaging, significantly improving prognosis.
• Abscesses occurring as part of a septicemic process, particularly with underlying malignancy, carry a grave prognosis.
• The shift towards earlier diagnosis and treatment has transformed PLA outcomes for primary cases.