Fig. 4
From: Pulmonary cavity with black sputum in COVID-19-Pneumoconiosis: a case report
Bronchial lavage fluid is medium black mucus. 2023.2 Provincial Fourth People’s Hospital
Fig. 4 | BMC Pulmonary Medicine
From: Pulmonary cavity with black sputum in COVID-19-Pneumoconiosis: a case report
Bronchial lavage fluid is medium black mucus. 2023.2 Provincial Fourth People’s Hospital