Pulmonary infiltrate

Radiologic or clinical finding indicating accumulation of inflammatory, infectious, or neoplastic cellular material, pus, blood, fluid, or protein within the lung parenchyma, producing focal or diffuse pulmonary opacities on chest imaging.

Causes

• Infectious causes

  • Pneumonia

  • Aspiration pneumonia

  • Lung abscess

  • Opportunistic pulmonary infections

• Inflammatory and autoimmune causes

  • Sarcoidosis

  • Systemic lupus erythematosus (SLE)

  • Vasculitis

  • Eosinophilic pneumonia

• Pulmonary causes

  • Pulmonary edema

  • Diffuse alveolar hemorrhage

  • Pulmonary alveolar proteinosis

  • Acute respiratory distress syndrome (ARDS)

• Malignant causes

  • Primary lung cancer

  • Pulmonary lymphoma

  • Metastatic malignancy

• Medication and treatment-related causes

  • Chemotherapy

  • Amiodarone

  • Radiotherapy