Fig. 4From: Esophageal anthracosis occurred after treatment of esophageal tuberculosis secondary to mediastinal tuberculous lymphadenitis: a rare case report Hematoxylin–eosin and acid-fast staining of the biopsy specimen. A Hematoxylin–eosin staining revealed chronic active mucositis with multinuclear giant cell reaction (arrow) in middle of the esophagus. B Several acid-fast bacilli (arrowheads) were found in the biopsy specimen with acid-fast stainingBack to article page