Differential diagnosis between amoebic liver abscess and acute cholecystitis

Area of Science:

• Gastroenterology
• Hepatology
• Infectious Diseases

Background:

• Acute abdominal pain is a common clinical presentation with diverse etiologies.
• Geographical variations exist in the prevalence of certain conditions, such as amoebic liver abscess in Mexico City.
• Distinguishing between amoebic liver abscess and acute cholecystitis is clinically difficult due to overlapping symptoms like right upper quadrant pain.

Purpose of the Study:

• To identify clinical variables that can effectively differentiate between amoebic liver abscess and acute cholecystitis.
• To develop a diagnostic approach based on symptoms and signs rather than solely laboratory tests.

Main Methods:

• Discriminant analysis and stepwise procedures were employed.
• A comparative study involving 100 patients with cholecystitis and 100 patients with amoebic liver abscess.
• Evaluation of specific symptoms and signs, including hepatomegaly, Murphy's sign, pain duration, medical history, dysentery, and facial pallor.

Main Results:

• Six clinical variables were identified as significant discriminators: hepatomegaly, Murphy's sign, pain duration ≥ 48 hours, prior abdominal pain history, dysentery, and facial pallor.
• Diagnostic accuracy reached 92% using five of these variables.
• Excluding ambiguous cases, accuracy increased to 96% with six variables, outperforming laboratory tests.

Conclusions:

• A combination of specific clinical signs and symptoms can reliably differentiate amoebic liver abscess from acute cholecystitis.
• This clinical approach offers a more accurate and potentially faster diagnostic method compared to laboratory tests alone for acute abdominal pain.