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Aggregate evidence quality: B; overwhelmingly consistent evidence from observational studies.
Benefit Determine presence of abscesses, which may require surgical intervention; avoid sequelae because of appropriate aggressive management. 
Harm Exposure to ionizing radiation for CT scans; need for sedation for MRI. 
Cost Direct cost of studies. 
Benefits-harm assessment Preponderance of benefit. 
Value judgments Concern for significant complication that may be unrecognized and, therefore, not treated appropriately. 
Role of patient preference Limited. 
Intentional vagueness None. 
Exclusions None. 
Strength Strong recommendation. 
Aggregate evidence quality: B; overwhelmingly consistent evidence from observational studies.
Benefit Determine presence of abscesses, which may require surgical intervention; avoid sequelae because of appropriate aggressive management. 
Harm Exposure to ionizing radiation for CT scans; need for sedation for MRI. 
Cost Direct cost of studies. 
Benefits-harm assessment Preponderance of benefit. 
Value judgments Concern for significant complication that may be unrecognized and, therefore, not treated appropriately. 
Role of patient preference Limited. 
Intentional vagueness None. 
Exclusions None. 
Strength Strong recommendation. 
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