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Fat Injury
Esther H. Y. Hung, MBChB, FRCR, FHKCR, FHKAM (Radiology); James F. Griffith, MD, MRCP, FRCR
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        TERMINOLOGY

        • Definitions

          • Focal inflammation ± necrosis ± atrophy of subcutaneous fat
          • Morel-Lavallée lesion: Shear injury leading to separation of subcutaneous tissue from underlying investing fascia creating potential space filled with blood, lymph, or other breakdown products

        IMAGING

        • General Features

          • Radiographic Findings

            • MR Findings

              • Ultrasonographic 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

                                      Selected References

                                      1. Depaoli R et al: Morel-Lavallée lesion of the knee in a soccer player. J Ultrasound. 18(1):87-9, 2015
                                      Related Anatomy
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                                      Related Differential Diagnoses
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                                      References
                                      Tables

                                      Tables

                                      KEY FACTS

                                      • Terminology

                                        • Imaging

                                          • Top Differential Diagnoses

                                            TERMINOLOGY

                                            • Definitions

                                              • Focal inflammation ± necrosis ± atrophy of subcutaneous fat
                                              • Morel-Lavallée lesion: Shear injury leading to separation of subcutaneous tissue from underlying investing fascia creating potential space filled with blood, lymph, or other breakdown products

                                            IMAGING

                                            • General Features

                                              • Radiographic Findings

                                                • MR Findings

                                                  • Ultrasonographic 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

                                                                          Selected References

                                                                          1. Depaoli R et al: Morel-Lavallée lesion of the knee in a soccer player. J Ultrasound. 18(1):87-9, 2015