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Actinomycosis
Tomás Franquet, MD, PhD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            • Diagnostic Checklist

              TERMINOLOGY

              • Definitions

                • Granulomatous infection caused by Actinomyces species, most commonly A. israelii, gram-positive anaerobic saprophytic organism
                  • Parenchymal actinomycosis: Aspiration of endogenous oropharyngeal organisms into lungs
                  • Bronchiectatic form: Colonization of devitalized tissue & bronchiectasis
                  • Endobronchial actinomycosis associated with broncholithiasis or foreign body: Colonization of preexisting endobronchial broncholith/foreign body

              IMAGING

              • Radiographic Findings

                • CT Findings

                  • Imaging Recommendations

                    DIFFERENTIAL DIAGNOSIS

                      PATHOLOGY

                      • General Features

                        • Gross Pathologic & Surgical Features

                          • Microscopic Features

                            CLINICAL ISSUES

                            • Presentation

                              • Demographics

                                • Natural History & Prognosis

                                  • Treatment

                                    DIAGNOSTIC CHECKLIST

                                    • Consider

                                      • Image Interpretation Pearls

                                        • Reporting Tips

                                          Selected References

                                          1. Song JU et al: Treatment of thoracic actinomycosis: A retrospective analysis of 40 patients. Ann Thorac Med. 5(2):80-5, 2010
                                          2. Kim TS et al: Thoracic actinomycosis: CT features with histopathologic correlation. AJR Am J Roentgenol. 186(1):225-31, 2006
                                          Related Anatomy
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                                          Related Differential Diagnoses
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                                          References
                                          Tables

                                          Tables

                                          KEY FACTS

                                          • Terminology

                                            • Imaging

                                              • Top Differential Diagnoses

                                                • Pathology

                                                  • Clinical Issues

                                                    • Diagnostic Checklist

                                                      TERMINOLOGY

                                                      • Definitions

                                                        • Granulomatous infection caused by Actinomyces species, most commonly A. israelii, gram-positive anaerobic saprophytic organism
                                                          • Parenchymal actinomycosis: Aspiration of endogenous oropharyngeal organisms into lungs
                                                          • Bronchiectatic form: Colonization of devitalized tissue & bronchiectasis
                                                          • Endobronchial actinomycosis associated with broncholithiasis or foreign body: Colonization of preexisting endobronchial broncholith/foreign body

                                                      IMAGING

                                                      • Radiographic Findings

                                                        • CT Findings

                                                          • Imaging Recommendations

                                                            DIFFERENTIAL DIAGNOSIS

                                                              PATHOLOGY

                                                              • General Features

                                                                • Gross Pathologic & Surgical Features

                                                                  • Microscopic Features

                                                                    CLINICAL ISSUES

                                                                    • Presentation

                                                                      • Demographics

                                                                        • Natural History & Prognosis

                                                                          • Treatment

                                                                            DIAGNOSTIC CHECKLIST

                                                                            • Consider

                                                                              • Image Interpretation Pearls

                                                                                • Reporting Tips

                                                                                  Selected References

                                                                                  1. Song JU et al: Treatment of thoracic actinomycosis: A retrospective analysis of 40 patients. Ann Thorac Med. 5(2):80-5, 2010
                                                                                  2. Kim TS et al: Thoracic actinomycosis: CT features with histopathologic correlation. AJR Am J Roentgenol. 186(1):225-31, 2006