Benign asbestos pleural effusion: diagnosis and course

Area of Science:

• Pulmonology
• Occupational Medicine
• Pathology

Background:

• Benign asbestos pleural effusion is a recognized consequence of asbestos exposure.
• Understanding its natural history and long-term outcomes is crucial for patient management.

Purpose of the Study:

• To review the clinical presentation, diagnostic findings, and long-term outcomes of patients with benign asbestos pleural effusion.
• To assess the recurrence rates and the development of asbestos-related neoplasms after diagnosis.

Main Methods:

• Retrospective review of 22 patients diagnosed with benign asbestos pleural effusion over 17 years.
• Analysis of patient demographics, exposure history, clinical presentation, pleural fluid analysis, pleural biopsy findings, and long-term follow-up data.

Main Results:

• The mean latency from asbestos exposure to effusion was 16.3 years. Effusions were often asymptomatic, blood-stained, and resolved spontaneously in a mean of 4.3 months.
• Elevated erythrocyte sedimentation rate (ESR) was common, but autoantibodies were rare. Pleural biopsies showed fibrosis and inflammation.
• Long-term follow-up revealed low recurrence rates (7/22 single recurrence) and no cases of mesothelioma or other neoplasms.

Conclusions:

• Benign asbestos pleural effusion generally has a favorable prognosis with low recurrence rates and no subsequent development of asbestos-related cancers.
• Predicting effusion recurrence or persistent pleural pain based on initial presentation is not possible with current data.
• This condition requires careful monitoring but does not appear to predispose to malignant transformation.