Sandbox:Aditya

Classification

Based on duration

• Acute
  • If symptoms are present for less than 6 weeks before presenting to medical care
• Chronic
  • If symptoms persist for more than 6 weeks

Based on Etiology

Primary

When Abscess develops among patients who were healthy previously or with high risk factors such as those prone for aspiration

• Aspiration of oropharyngeal secretions
• Immunodeficiency conditions like HIV
• Necrotizing pneumonitis

Secondary

When abscess develops among patients due to other associated medical conditions

• Bronchial obstruction
• Hematogenic dissemination
• Infection spread from mediastinum
• Coexisting Lung Diseases

Based on mode of spread

• Bronchiogenic
  • Aspiration of Oropharyngeal secretions
  • Bronchial obstruction by Tumor
  • Foreign body, Congenital Malformations and Enlarged LymphNodes
• Hematogenic
  • Infective endocarditis
  • Abdominal Sepsis
  • Septic Thromboembolisim