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Aetiology: - Extension of intraperitoneal infections- appendicitis, perforated DU, diverticulitis.
 
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Presentation: - Tachycardia, pain, fever, malaise, Palpable mass (sometime)
 
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CT scan – modality of choice 
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Management: - Antibiotics, treatment of primary infection,
- CT guided drainage for unilocular abscess,
- Surgical drainage for multilocular abscesses.