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Atelectasis, Lobar
Helen T. Winer-Muram, MD
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KEY FACTS

  • Terminology

    • Imaging Findings

      • Top Differential Diagnoses

        • Clinical Issues

          • Diagnostic Checklist

            TERMINOLOGY

            • Abbreviations and Synonyms

              • Lobar volume loss, lobar collapse
              • Lateral radiographs are presented as though sternum is on left and spine on right
              • Posteroanterior radiograph (PA), lateral radiograph (lat)
            • Definitions

              • Airspace volume loss of an entire lobe which may be due to bronchial obstruction, cicatricial scarring, loss of surfactant (adhesive), or compression from a space occupying mass
              • "Silhouette" sign - loss of air - soft tissue interface when collapsed lung abuts an adjacent soft tissue structure

            IMAGING FINDINGS

            • General Features

              • Radiographic Findings

                • CT Findings

                  • Imaging Recommendations

                    DIFFERENTIAL DIAGNOSIS

                      PATHOLOGY

                      • General Features

                        • Gross Pathologic & Surgical Features

                          CLINICAL ISSUES

                          • Presentation

                            • Demographics

                              • Natural History & Prognosis

                                • Treatment

                                  DIAGNOSTIC CHECKLIST

                                  • Consider

                                    • Image Interpretation Pearls

                                      Selected References

                                      1. Gupta P: The Golden S sign. Radiology. 233(3):790-1, 2004
                                      2. Ashizawa K et al: Lobar atelectasis: diagnostic pitfalls on chest radiography. Br J Radiol. 74(877):89-97, 2001
                                      3. Blankenbaker DG: The luftsichel sign. Radiology. 208(2):319-20, 1998
                                      4. Gurney JW: Atypical manifestations of pulmonary atelectasis. J Thorac Imaging. 11(3):165-75, 1996
                                      5. Proto AV et al: Radiographic manifestations of lobar collapse. Semin Roentgenol. 15(2):117-73, 1980
                                      Related Anatomy
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                                      Related Differential Diagnoses
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                                      References
                                      Tables

                                      Tables

                                      KEY FACTS

                                      • Terminology

                                        • Imaging Findings

                                          • Top Differential Diagnoses

                                            • Clinical Issues

                                              • Diagnostic Checklist

                                                TERMINOLOGY

                                                • Abbreviations and Synonyms

                                                  • Lobar volume loss, lobar collapse
                                                  • Lateral radiographs are presented as though sternum is on left and spine on right
                                                  • Posteroanterior radiograph (PA), lateral radiograph (lat)
                                                • Definitions

                                                  • Airspace volume loss of an entire lobe which may be due to bronchial obstruction, cicatricial scarring, loss of surfactant (adhesive), or compression from a space occupying mass
                                                  • "Silhouette" sign - loss of air - soft tissue interface when collapsed lung abuts an adjacent soft tissue structure

                                                IMAGING FINDINGS

                                                • General Features

                                                  • Radiographic Findings

                                                    • CT Findings

                                                      • Imaging Recommendations

                                                        DIFFERENTIAL DIAGNOSIS

                                                          PATHOLOGY

                                                          • General Features

                                                            • Gross Pathologic & Surgical Features

                                                              CLINICAL ISSUES

                                                              • Presentation

                                                                • Demographics

                                                                  • Natural History & Prognosis

                                                                    • Treatment

                                                                      DIAGNOSTIC CHECKLIST

                                                                      • Consider

                                                                        • Image Interpretation Pearls

                                                                          Selected References

                                                                          1. Gupta P: The Golden S sign. Radiology. 233(3):790-1, 2004
                                                                          2. Ashizawa K et al: Lobar atelectasis: diagnostic pitfalls on chest radiography. Br J Radiol. 74(877):89-97, 2001
                                                                          3. Blankenbaker DG: The luftsichel sign. Radiology. 208(2):319-20, 1998
                                                                          4. Gurney JW: Atypical manifestations of pulmonary atelectasis. J Thorac Imaging. 11(3):165-75, 1996
                                                                          5. Proto AV et al: Radiographic manifestations of lobar collapse. Semin Roentgenol. 15(2):117-73, 1980