Non-neoplastic conditions

Non-neoplastic conditions

In many benign disorders, effusions show a non-specific cytologic picture. However, some conditions are characterized by specific cytologic features which may be helpful in the differential diagnosis.

  • Acute serositis
  • Eosinophilic effusions
  • Tuberculosis pleuritis
  • Rheumatoid pleuritis
  • Systemic lupus erithematosus (SLE)

Effusions due to pulmonary infarct

  • Reactive mesothelial cells (often)
  • Mitoses
  • Haemosiderinophages
  • Eosinophils (up to 60%)
  • Lymphocytes and neutrophils
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