Fetus-in-fetu: Parasite or Neoplasm?

@article{Saito2007FetusinfetuPO,
  title={Fetus-in-fetu: Parasite or Neoplasm?},
  author={Keisuke Saito and Yusuke Katsumata and Tomoo Hirabuki and Keisuke Kato and Michiko Yamanaka},
  journal={Fetal Diagnosis and Therapy},
  year={2007},
  volume={22},
  pages={383 - 388}
}
Introduction: Fetus-in-fetu is a rare congenital fetiform mass whose etiology is still controversial. We report two cases of fetus-in-fetu. Case 1: A fetal retroperitoneal cystic tumor including two masses was detected by ultrasonography at 26 gestational weeks. The masses showed distinctive structures resembling a vertebral axis and were prenatally diagnosed as fetus-in-fetu. A resected specimen revealed two fetiform masses. Case 2: An intracranial tumor with hydrocephalus was detected by… 
View via Publisher
6 Citations

Figures from this paper

6 Citations

Foetus-in-Fetu.
TLDR
A case of a newborn in whom abdominal radiograph and ultrasonography revealed a mass in which the contents favour a foetus-in-fetu, attached to the membranous sac.
Intracranial fetus‐in‐fetu with numerous fully developed organs
TLDR
This case provides strong evidence against Willis's hypothesis but supports Spencer's theory of abnormal twinning.
Metastatic synovial sarcoma, masquerading a carcinoma from a tonsillar primary: A rare case presentation
TLDR
This case of immature retroperitoneal teratoma grade 3 is reported for its unique presentation as fetiform mass with immature neuroectodermal elements.
INTRAHEPATIC FOETUS IN FOETU IN ADULT MALE: A CASE REPORT AND REVIEW OF THE LITERATURE
TLDR
Surgical excision under general anaesthesia and macroscopic and microscopic analysis accompanied by review of literature confirmed the mass had features consistent with a foetus in foetu, initially diagnosed as intrahepatic teratoma or partially healed hydatid cyst complicated by gas forming organism.
Unusual Imaging Findings Associated with Germ Cell Tumors.
TLDR
Autoimmune and endocrine manifestations such as paraneoplastic encephalitis, autoimmune hemolytic anemia, and hyperthyroidism may occur owing to the presence of germ cell tumors and can create a diagnostic dilemma for clinicians.
Origin, formation mechanism and prenatal diagnosis of the intracranial Fetus-in-fetu. Review of the literature
TLDR
The Origin, formation mechanism and prenatal diagnosis of the intracranial Fetus-in-fetu and review of the literature are reviewed.

References

SHOWING 1-10 OF 14 REFERENCES
Fetus in fetu: a case report and literature review.
TLDR
A 19-month-old girl whose plain abdominal radiograph, ultrasonography, and computed tomography scan revealed a mass in which the contents favor a fetus in fetu rather than a teratoma is reported on.
Highly differentiated teratoma and fetus-in-fetu: a single pathology?
Fetus-in-fetu with malignant recurrence.
Sonographic prenatal diagnosis of intracranial fetus in fetu
A case of sonographic prenatal diagnosis of a complex intracranial mass, with features of a fetus in fetu at 17 weeks' gestation, is reported. This diagnosis is reserved for a highly organized tumor…
Foetus in Foetu and the Retroperitoneal Teratoma
  • R. Lewis
  • Medicine
    Archives of disease in childhood
  • 1961
TLDR
A further case where borderline pathological features are present is described to discuss and compare briefly the retroperitoneal teratoma and foetus in foetu, emphasizing that the former is a true tumour while the latter is not.
Foetus in foetu.
  • K. R. Pai, K. M. Rao
  • Medicine, Biology
    The Australian and New Zealand journal of surgery
  • 1966
TLDR
A case of foetus in foetu or included twin, which is usually a monochorionic, diamniotic, monozygotic twin of its bearer, which was included within it during development is presented.
The structure of teratomata
Intra‐abdominal fœtus in fœtu
A cerebral tumor containing five human fetuses. A case of fetus in fetu
Ultrasonic prenatal diagnosis of fetus in fetu
...
...