Cholesterol Granuloma in the Maxillary Sinus: Are Endodontically Treated Teeth Involved in Its Etiopathogenesis?

Figure 1

(a) Opacity and cystic appearance in the right maxillary sinus associated with the roots of the maxillary right first molar; (b) cholesterol granuloma characterized by numerous longitudinal clefts permeated by irregular eosinophilic material surrounded by foreign body giant cells and macrophages (hematoxylin-eosin stain, ×100); (c) cystic mass in maxillary sinus in close association with the apex of the maxillary right second premolar; (d) foreign body reaction with accumulation of cholesterol clefts involving macrophages and foreign body giant cells (hematoxylin-eosin stain, ×400).

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(b)

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