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Fetus-in-Fetu
Anne M. Kennedy, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Clinical Issues

          • Diagnostic Checklist

            TERMINOLOGY

            • Definitions

              • Variant of monochorionic diamniotic twinning in which abnormal fetus is encompassed within body of other twin

            IMAGING

            • General Features

              • Ultrasonographic Findings

                • Imaging Recommendations

                  DIFFERENTIAL DIAGNOSIS

                    PATHOLOGY

                    • General Features

                      • Gross Pathologic & Surgical Features

                        CLINICAL ISSUES

                        • Presentation

                          • Demographics

                            • Natural History & Prognosis

                              • Treatment

                                DIAGNOSTIC CHECKLIST

                                • Image Interpretation Pearls

                                  Selected References

                                  1. Mcnamara HC et al: A review of the mechanisms and evidence for typical and atypical twinning. Am J Obstet Gynecol. 214(2):172-91, 2015
                                  2. Goyal RB et al: Fetus in fetu: report of two cases. APSP J Case Rep. 5(3):28, 2014
                                  3. Ji Y et al: Fetus in fetu: two case reports and literature review. BMC Pediatr. 14:88, 2014
                                  4. Sathe PA et al: Fetus in fetu: an institutional experience. Pediatr Dev Pathol. 17(4):243-9, 2014
                                  5. Has R et al: Prenatal sonographic diagnosis of fetus in fetu. J Ultrasound Med. 32(12):2212-4, 2013
                                  6. Kehal H et al: Fetus-in-Fetu: Mimicking as Teratoma on Antenatal Ultrasound. Indian J Surg. 75(Suppl 1):412-4, 2013
                                  7. Savelli S et al: A well-documented multimodality imaging approach to fetus in fetu: pre- and postnatal imaging features. Pediatr Radiol. 41(10):1337-41, 2011
                                  8. Arlikar JD et al: Fetus in fetu: two case reports and review of literature. Pediatr Surg Int. 25(3):289-92, 2009
                                  9. Escobar MA et al: Fetus-in-fetu: report of a case and a review of the literature. J Pediatr Surg. 43(5):943-6, 2008
                                  10. Gerber RE et al: Fetus in fetu: 11 fetoid forms in a single fetus: review of the literature and imaging. J Ultrasound Med. 2008 Sep;27(9):1381-7. Review. Erratum in: J Ultrasound Med. 27(11):1562, 2008
                                  11. Tofigh AM et al: Fetus in fetu: report of a case and literature review. Int J Surg. 6(6):e94-6, 2008
                                  12. Chua JH et al: Fetus-in-fetu in the pelvis: report of a case and literature review. Ann Acad Med Singapore. 34(10):646-9, 2005
                                  13. Brand A et al: Fetus in fetu--diagnostic criteria and differential diagnosis--a case report and literature review. J Pediatr Surg. 39(4):616-8, 2004
                                  14. Federici S et al: Fetus in fetu: report of an additional, well-developed case. Pediatr Surg Int. 17(5-6):483-5, 2001
                                  15. Spencer R: Parasitic conjoined twins: external, internal (fetuses in fetu and teratomas), and detached (acardiacs). Clin Anat. 14(6):428-44, 2001
                                  16. Hoeffel CC et al: Fetus in fetu: a case report and literature review. Pediatrics. 105(6):1335-44, 2000
                                  17. Magnus KG et al: Intrahepatic fetus-in-fetu: a case report and review of the literature. J Pediatr Surg. 34(12):1861-4, 1999
                                  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

                                          • Diagnostic Checklist

                                            TERMINOLOGY

                                            • Definitions

                                              • Variant of monochorionic diamniotic twinning in which abnormal fetus is encompassed within body of other twin

                                            IMAGING

                                            • General Features

                                              • Ultrasonographic Findings

                                                • Imaging Recommendations

                                                  DIFFERENTIAL DIAGNOSIS

                                                    PATHOLOGY

                                                    • General Features

                                                      • Gross Pathologic & Surgical Features

                                                        CLINICAL ISSUES

                                                        • Presentation

                                                          • Demographics

                                                            • Natural History & Prognosis

                                                              • Treatment

                                                                DIAGNOSTIC CHECKLIST

                                                                • Image Interpretation Pearls

                                                                  Selected References

                                                                  1. Mcnamara HC et al: A review of the mechanisms and evidence for typical and atypical twinning. Am J Obstet Gynecol. 214(2):172-91, 2015
                                                                  2. Goyal RB et al: Fetus in fetu: report of two cases. APSP J Case Rep. 5(3):28, 2014
                                                                  3. Ji Y et al: Fetus in fetu: two case reports and literature review. BMC Pediatr. 14:88, 2014
                                                                  4. Sathe PA et al: Fetus in fetu: an institutional experience. Pediatr Dev Pathol. 17(4):243-9, 2014
                                                                  5. Has R et al: Prenatal sonographic diagnosis of fetus in fetu. J Ultrasound Med. 32(12):2212-4, 2013
                                                                  6. Kehal H et al: Fetus-in-Fetu: Mimicking as Teratoma on Antenatal Ultrasound. Indian J Surg. 75(Suppl 1):412-4, 2013
                                                                  7. Savelli S et al: A well-documented multimodality imaging approach to fetus in fetu: pre- and postnatal imaging features. Pediatr Radiol. 41(10):1337-41, 2011
                                                                  8. Arlikar JD et al: Fetus in fetu: two case reports and review of literature. Pediatr Surg Int. 25(3):289-92, 2009
                                                                  9. Escobar MA et al: Fetus-in-fetu: report of a case and a review of the literature. J Pediatr Surg. 43(5):943-6, 2008
                                                                  10. Gerber RE et al: Fetus in fetu: 11 fetoid forms in a single fetus: review of the literature and imaging. J Ultrasound Med. 2008 Sep;27(9):1381-7. Review. Erratum in: J Ultrasound Med. 27(11):1562, 2008
                                                                  11. Tofigh AM et al: Fetus in fetu: report of a case and literature review. Int J Surg. 6(6):e94-6, 2008
                                                                  12. Chua JH et al: Fetus-in-fetu in the pelvis: report of a case and literature review. Ann Acad Med Singapore. 34(10):646-9, 2005
                                                                  13. Brand A et al: Fetus in fetu--diagnostic criteria and differential diagnosis--a case report and literature review. J Pediatr Surg. 39(4):616-8, 2004
                                                                  14. Federici S et al: Fetus in fetu: report of an additional, well-developed case. Pediatr Surg Int. 17(5-6):483-5, 2001
                                                                  15. Spencer R: Parasitic conjoined twins: external, internal (fetuses in fetu and teratomas), and detached (acardiacs). Clin Anat. 14(6):428-44, 2001
                                                                  16. Hoeffel CC et al: Fetus in fetu: a case report and literature review. Pediatrics. 105(6):1335-44, 2000
                                                                  17. Magnus KG et al: Intrahepatic fetus-in-fetu: a case report and review of the literature. J Pediatr Surg. 34(12):1861-4, 1999