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Fetus in fetu in an adult woman
  1. Anil Kumar1,
  2. Shiv Shankar Paswan2,
  3. Bindey Kumar3 and
  4. Prem Kumar4
  1. 1 General Surgery (Trauma), All India Institute of Medical Sciences, Patna, Bihar, India
  2. 2 Trauma and Emergency, All India Institute of Medical Sciences, Bhubaneswar, Odisha, India
  3. 3 Pediatric Surgery, All India Institute of Medical Sciences, Patna, Bihar, India
  4. 4 Radiodiagnosis, All India Institute of Medical Sciences, Patna, Bihar, India
  1. Correspondence to Dr Anil Kumar, dranil4{at}


Fetus in fetu (FIF) is an extremely rare condition in which malformed fetus is found most commonly in the retroperitoneum of living twin. It occurs in about 1 in 500 000 live births and less than 200 cases have been reported in medical literature. We report FIF in a 17-year-old woman unlike other cases which were usually detected in early age and in male gender. This is the eighth case of adult FIF and the first case of FIF in adult woman worldwide. Preoperative diagnosis of FIF on CT was made and planned for exploratory laparotomy. The excised malformed fetus in a sac was proven as FIF on the basis of histopathological examination. In view to avoid such late presentation, early detection of FIF with radiological imaging in clinically suspected case is recommended. Surgical excision is the ideal treatment even teratoma is the differential diagnosis.

  • congenital disorders
  • pathology
  • radiology
  • general surgery

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  • Contributors Manuscript writing, editing and design: AK; concept and operating the patient: SSP; review of literature and radiological review of CT film: PK; review of the manuscript and literature search: BK.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Patient consent for publication Obtained.

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