Fetus in fetu: 11 fetoid forms in a single fetus: review of the literature and imaging
| Autor: | Rebecca E, Gerber, Aya, Kamaya, Stephanie S, Miller, Ashima, Madan, Danielle M, Cronin, Bonnie, Dwyer, Jane, Chueh, Karen E, Conner, Richard A, Barth |
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| Rok vydání: | 2008 |
| Předmět: |
Adult
Pathology medicine.medical_specialty Acardiac monster Twin reversed arterial perfusion Ultrasonography Prenatal Fetus Pregnancy Fetus in fetu Female patient medicine Humans Radiology Nuclear Medicine and imaging Abnormalities Multiple reproductive and urinary physiology Radiological and Ultrasound Technology business.industry Monozygotic Twinning Anatomy Twins Monozygotic medicine.disease medicine.anatomical_structure embryonic structures Female Teratoma business Vertebral column |
| Zdroj: | Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine. 27(9) |
| ISSN: | 1550-9613 |
| Popis: | The term "fetus in fetu" was first coined by Johann Friedrich Meckel in the late 18th century to describe an encapsulated fetoid tumor within a fetus. Since then, fewer than 100 cases of fetus in fetu have been reported in the medical literature. The incidence of fetus in fetu is estimated to be approximately 1 per 500,000 births, 1 occurring relatively equally in male and female patients. 2 Debate exists as to whether fetus in fetu is a variant in the spectrum of monozygotic twinning or if it is simply a highly differentiated teratoma. The presence of a partial or whole vertebral column plus other appropriately situated axial or appendicular bones or organs constitutes the hallmark of fetus in fetu. 3 The conservative definition is the presence of a vertebral axis, which occurs in most cases. The more liberal definition was proposed by Gonzalez-Crussi, 4 who defined fetus in fetu as "high organotypic development and presence of a vertebral axis with arrangement of tissues around this axis." It has been suggested that fetus in fetu is part of a spectrum of anomalous embryogenesis, including conjoined symmetric twins, parasitic fetuses, embryonic vestigial fetal inclusions, organized teratoma, and the twin reversed arterial perfusion sequence (also referred to as "acardiac monster"). |
| Databáze: | OpenAIRE |
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