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Pelvic Lipomatosis
Bryan R. Foster, MD; Matthew T. Heller, MD, FSAR
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Clinical Issues

          TERMINOLOGY

          • Abbreviations

            • Pelvic lipomatosis (PL)
          • Definitions

            • Uncommon, progressive overgrowth of benign, mature, unencapsulated fat in perirectal and perivesical spaces

          IMAGING

          • General Features

            • Radiographic Findings

              • Fluoroscopic Findings

                • CT 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. Ashwin Shekar P et al: Difficult cystoscopy due to "elongated" urethra- think of pelvic lipomatosis. Urol Case Rep. 34:101492, 2021
                                            2. Bai X et al: Diagnostic accuracy of CT imaging parameters in pelvic lipomatosis. Abdom Radiol (NY). 46(6):2779-88, 2021
                                            3. Zhao J et al: Pelvic lipomatosis and renal transplantation: a case report. World J Clin Cases. 8(16):3548-52, 2020
                                            4. Hermie I et al: Pelvic lipomatosis causing renal failure. J Belg Soc Radiol. 100(1):55, 2016
                                            5. Sun Y et al: Value of multimode sonography for assessment of pelvic lipomatosis compared with computed tomography. J Ultrasound Med. 35(6):1143-8, 2016
                                            6. Kani KK et al: Extrahepatic, nonneoplastic, fat-containing lesions of the abdominopelvic cavity: spectrum of lesions, significance, and typical appearance on multidetector computed tomography. Curr Probl Diagn Radiol. 41(2):56-72, 2012
                                            7. Zhang Y et al: Measuring diagnostic accuracy of imaging parameters in pelvic lipomatosis. Eur J Radiol. 81(11):3107-14, 2012
                                            8. Yesilkaya Y et al: Pelvic lipomatosis: US and CT diagnosis. Biomed Imaging Interv J. 8(2):e12, 2012
                                            9. Craig WD et al: Fat-containing lesions of the retroperitoneum: radiologic-pathologic correlation. Radiographics. 29(1):261-90, 2009
                                            10. Sözen S et al: The importance of re-evaluation in patients with cystitis glandularis associated with pelvic lipomatosis: a case report. Urol Oncol. 22(5):428-30, 2004
                                            11. Andaç N et al: Fat necrosis mimicking liposarcoma in a patient with pelvic lipomatosis. CT findings. Clin Imaging. 27(2):109-11, 2003
                                            12. Heyns CF: Pelvic lipomatosis: a review of its diagnosis and management. J Urol. 146(2):267-73, 1991
                                            13. Demas BE et al: Pelvic lipomatosis: diagnosis and characterization by magnetic resonance imaging. Urol Radiol. 10(4):198-202, 1988
                                            14. Klein FA et al: Pelvic lipomatosis: 35-year experience. J Urol. 139(5):998-1001, 1988
                                            15. Clark WM et al: Ultrasonographic features of pelvic lipomatosis. Urol Radiol. 1(3):183-6, 1979-1980
                                            16. Chang SF: Pear-shaped bladder caused by large iliopsoas muscles. Radiology. 128(2):349-50, 1978
                                            17. Ambos MA et al: The pear-shaped bladder. Radiology. 122(1):85-8, 1977
                                            18. Moss AA et al: Pelvic lipomatosis: a roentgenographic diagnosis. Am J Roentgenol Radium Ther Nucl Med. 115(2):411-9, 1972
                                            Related Anatomy
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                                            Related Differential Diagnoses
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                                            References
                                            Tables

                                            Tables

                                            KEY FACTS

                                            • Terminology

                                              • Imaging

                                                • Top Differential Diagnoses

                                                  • Clinical Issues

                                                    TERMINOLOGY

                                                    • Abbreviations

                                                      • Pelvic lipomatosis (PL)
                                                    • Definitions

                                                      • Uncommon, progressive overgrowth of benign, mature, unencapsulated fat in perirectal and perivesical spaces

                                                    IMAGING

                                                    • General Features

                                                      • Radiographic Findings

                                                        • Fluoroscopic Findings

                                                          • CT 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. Ashwin Shekar P et al: Difficult cystoscopy due to "elongated" urethra- think of pelvic lipomatosis. Urol Case Rep. 34:101492, 2021
                                                                                      2. Bai X et al: Diagnostic accuracy of CT imaging parameters in pelvic lipomatosis. Abdom Radiol (NY). 46(6):2779-88, 2021
                                                                                      3. Zhao J et al: Pelvic lipomatosis and renal transplantation: a case report. World J Clin Cases. 8(16):3548-52, 2020
                                                                                      4. Hermie I et al: Pelvic lipomatosis causing renal failure. J Belg Soc Radiol. 100(1):55, 2016
                                                                                      5. Sun Y et al: Value of multimode sonography for assessment of pelvic lipomatosis compared with computed tomography. J Ultrasound Med. 35(6):1143-8, 2016
                                                                                      6. Kani KK et al: Extrahepatic, nonneoplastic, fat-containing lesions of the abdominopelvic cavity: spectrum of lesions, significance, and typical appearance on multidetector computed tomography. Curr Probl Diagn Radiol. 41(2):56-72, 2012
                                                                                      7. Zhang Y et al: Measuring diagnostic accuracy of imaging parameters in pelvic lipomatosis. Eur J Radiol. 81(11):3107-14, 2012
                                                                                      8. Yesilkaya Y et al: Pelvic lipomatosis: US and CT diagnosis. Biomed Imaging Interv J. 8(2):e12, 2012
                                                                                      9. Craig WD et al: Fat-containing lesions of the retroperitoneum: radiologic-pathologic correlation. Radiographics. 29(1):261-90, 2009
                                                                                      10. Sözen S et al: The importance of re-evaluation in patients with cystitis glandularis associated with pelvic lipomatosis: a case report. Urol Oncol. 22(5):428-30, 2004
                                                                                      11. Andaç N et al: Fat necrosis mimicking liposarcoma in a patient with pelvic lipomatosis. CT findings. Clin Imaging. 27(2):109-11, 2003
                                                                                      12. Heyns CF: Pelvic lipomatosis: a review of its diagnosis and management. J Urol. 146(2):267-73, 1991
                                                                                      13. Demas BE et al: Pelvic lipomatosis: diagnosis and characterization by magnetic resonance imaging. Urol Radiol. 10(4):198-202, 1988
                                                                                      14. Klein FA et al: Pelvic lipomatosis: 35-year experience. J Urol. 139(5):998-1001, 1988
                                                                                      15. Clark WM et al: Ultrasonographic features of pelvic lipomatosis. Urol Radiol. 1(3):183-6, 1979-1980
                                                                                      16. Chang SF: Pear-shaped bladder caused by large iliopsoas muscles. Radiology. 128(2):349-50, 1978
                                                                                      17. Ambos MA et al: The pear-shaped bladder. Radiology. 122(1):85-8, 1977
                                                                                      18. Moss AA et al: Pelvic lipomatosis: a roentgenographic diagnosis. Am J Roentgenol Radium Ther Nucl Med. 115(2):411-9, 1972