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* From the Departments of Respiratory Medicine (Drs. Cunnington, Teichtahl, and Hunt) and Pathology (Drs. Dow and Valentine), Western Hospital, Melbourne, Australia.
Correspondence to: David Cunnington, MB,BS, Department of Respiratory Medicine, Western Hospital, Gordon St, Footscray 3011, Australia; e-mail: david.cunnington{at}nwhcn.org.au
We describe the case of a heavy marijuana and tobacco smoker who presented with progressive exertional dyspnea of 2 months duration, and bilateral nodular lung infiltrates. Examination of the lung fields was normal, and lung function tests showed mild airflow obstruction with moderately reduced gas transfer. BAL returned green-black fluid consisting predominantly of macrophages laden with carbon pigment. Thoracoscopic lung biopsy showed miliary necrotizing granulomata with an alveolar exudate of carbon-laden macrophages within macroscopically blackened lung. The differential diagnosis of pulmonary granulomata in this patient is discussed.
Key Words: granuloma marijuana pulmonary tobacco
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