title: Foam cell transformation in periapical lesions of endodontic origin.
mesh_terms: D000328:Adult; D005260:Female; D005487:Foam Cells / Q000473:pathology*; D006801:Humans; D008264:Macrophages / Q000473:pathology*; D010482:Periapical Abscess / Q000209:etiology / Q000473:pathology*; D012390:Root Canal Therapy / Q000009:adverse effects*