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Pulmonary hemorrhage due to inhalation of vapor containing pyromellitic dianhydride
1Department of Internal Medicine, University Hospital of Zürich, Switzerland.
Abstract:
Pulmonary hemorrhage due to inhalation of fumes or powders containing trimellitic anhydride (TMA) is well known. We report pulmonary hemorrhage in a young man exposed to epoxy resin vapor containing pyromellitic dianhydride (PMDA). Serum IgG antibodies to PMDA could be detected. We conclude that the pulmonary hemorrhage was mediated by a reaction to PMDA in analogy to the TMA-induced disease. We suggest that exposure to any acid anhydride should be considered a possible cause of pulmonary hemorrhage since these compounds share structural and functional similarities.
Insights
Pulmonary hemorrhage can be caused by inhaling trimellitic anhydride (TMA) fumes. A similar case in a young man exposed to pyromellitic dianhydride (PMDA) suggests this chemical may also cause lung bleeding.
Area of Science:
- Pulmonary Medicine
- Toxicology
- Immunology
Background:
- Trimellitic anhydride (TMA) is a known cause of pulmonary hemorrhage following inhalation.
- Acid anhydrides are industrial chemicals with potential respiratory toxicity.
Observation:
- A young man developed pulmonary hemorrhage after exposure to epoxy resin vapor.
- The epoxy resin vapor contained pyromellitic dianhydride (PMDA).
Findings:
- Serum IgG antibodies specific to PMDA were detected in the patient.
- The clinical presentation and immunological findings suggest PMDA-induced pulmonary hemorrhage.
Implications:
- Pyromellitic dianhydride (PMDA) should be considered a potential cause of pulmonary hemorrhage.
- Exposure to various acid anhydrides may pose a risk for inducing pulmonary hemorrhage.
- Further investigation into the respiratory effects of acid anhydrides is warranted.