Fig. 6

Histopathological examination. Histological examination revealed marked lymphplasma infiltration in the mucosa of the dilated bronchiole, mucin and inflammatory exudates in the lumen (a, left, hematoxylin and eosin stain, 20X). A few small foreign body-like material and aggregation of the foamy histiocytes were noted in the peripheral parenchyma of the dilated bronchiole, which may be the residual fragments of the chicken bone (a, right, white arrowhead, hematoxylin and eosin stain, 200X). In another specimen a bit far away of the dilated bronchiole, a tuberculoma was found with abundant caseous necrosis surrounded by granulomatous inflammation and multinuclear Langhan’s giant cells (b, hematoxylin and eosin stain, 200X)