Fig. 5
From: Pulmonary cavity with black sputum in COVID-19-Pneumoconiosis: a case report

Bronchoscopy showed carbon foam was deposited in bilateral bronchial mucosa.2023.2 Provincial Fourth People’s
From: Pulmonary cavity with black sputum in COVID-19-Pneumoconiosis: a case report
Bronchoscopy showed carbon foam was deposited in bilateral bronchial mucosa.2023.2 Provincial Fourth People’s