The document discusses Entamoeba histolytica, a parasite that can cause liver abscesses. The most common extraintestinal symptoms are fever, right upper quadrant pain, anorexia and point tenderness in the right upper quadrant area, with jaundice being rare. Diagnostic tests for liver abscesses caused by E. histolytica include ultrasonography, CT scan, MRI, and Elisa antibody tests. Treatment is generally metronidazole, with 90% seeing a good response within 72 hours.

2. Entamoeba histolytica Most common extraintestinal syndrome Fever, RUQ pain, anorexia Point tenderness RUQ area Jaundice is rare <30% will have a history of diarrhea Must be included in the Ddx of FUO

3. Pleural effusion Hepatobronchial fistula Rupture into peritoneal cavity Rupture into pericardium

4. Ultrasonography: solitary; R lobe CT scan MRI Elisa

6. 90% good response to metronidazole Response in 72 hours Indications: To rule out pyogenic cause (multiple lesions) Poor response after 72 hours Imminent rupture Prevent rupture into pericardium