Which combination represents the diagnostic workup for a suspected lung abscess?

Which combination represents the diagnostic workup for a suspected lung abscess?

• A. CBC, sputum culture, CXR, CT chest
• B. Bronchoscopy and FNA biopsy only
• C. MRI and PET scan
• D. Spirometry and diffusion capacity

Answer: (A)

Diagnosing a suspected lung abscess hinges on confirming infection, identifying the likely pathogens, and defining the lesion’s extent. A typical workup starts with a CBC to look for leukocytosis, and a sputum culture to try to grow the causative organism (often anaerobes in aspiration-related abscesses). Imaging is essential: a chest radiograph can reveal a cavitary lesion with an air-fluid level, and a CT scan of the chest provides detailed anatomy, helping to delineate size and location, assess complications, and guide management. Bronchoscopy with fine-needle aspiration biopsy is not routinely needed and is reserved for specific scenarios where microbiologic sampling from the airways or tissue is required or when the diagnosis is uncertain. MRI and PET scans aren’t first-line for acute suspected abscess and are not typically necessary for establishing the diagnosis. Spirometry and diffusion capacity measure lung function and do not contribute to diagnosing an infection like a lung abscess.

Diagnosing a suspected lung abscess hinges on confirming infection, identifying the likely pathogens, and defining the lesion’s extent. A typical workup starts with a CBC to look for leukocytosis, and a sputum culture to try to grow the causative organism (often anaerobes in aspiration-related abscesses). Imaging is essential: a chest radiograph can reveal a cavitary lesion with an air-fluid level, and a CT scan of the chest provides detailed anatomy, helping to delineate size and location, assess complications, and guide management. Bronchoscopy with fine-needle aspiration biopsy is not routinely needed and is reserved for specific scenarios where microbiologic sampling from the airways or tissue is required or when the diagnosis is uncertain. MRI and PET scans aren’t first-line for acute suspected abscess and are not typically necessary for establishing the diagnosis. Spirometry and diffusion capacity measure lung function and do not contribute to diagnosing an infection like a lung abscess.