Fig. 5From: A lung abscess caused by secondary syphilis – the utility of polymerase chain reaction techniques in transbronchial biopsy: a case reportGross and microscopic pathology of lung specimens obtained by surgery a Gross pathology showed pus inside the lung abscess (arrow), b Microscopic pathology showed granuloma formation by epithelioid histiocytes and Langhans giant cells (arrow), in addition to necrosis (arrow-head). Original Magnification X100. Hematoxylin and eosin (HE) stainingBack to article page