Fig. 3
Pathologic findings of drained materials. a The haematoxylin-eosin stain (× 4), of the curettage specimen shows necrotic bone detritus (arrowhead) and inflamed granulation tissue consistent with osteomyelitis. We identified a sulfur granule (arrow). b The haematoxylin-eosin stain (× 40), shows the sulfur granule (asterisk) is rimmed by neutrophils. The granule is composed of filamentous bacteria embedded in an amorphous matrix. c GMS stain (× 20) shows individual bacterial filaments (arrows)