Teratoma is a congenital neoplasm deriving from one or more embryonic layers. Fetiform teratoma is a highly differentiated rare type of teratoma. The authors present a 1-day-old neonate for a lumbar region mass, grossly appearing like an extremity. CT scan was performed showing a highly organized extremity skeleton in the lumbar region consisting of flat, long and short bones. Fetiform teratoma should be differentiated from a fetus in fetu, as the former lacks axial skeleton while it is the main feature of the latter, respectively. Both have different prognostic implications, and surgical excision is the treatment of choice.
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http://dx.doi.org/10.1016/j.radcr.2021.11.037 | DOI Listing |
Fetiform teratoma, another name for homunculus, is a rare form of mature teratoma that is highly differentiated and has parts that resemble a malformed fetus. We reported a case of ovarian Fetiform teratoma in a 38 years old nulliparous woman presented with right side abdominal distention of 10 years duration. An ultrasound revealed a heterogeneous pelvic cystic mass that ranged in appearance from fully hyperechoic to fully hypoechoic, suggesting mature cystic teratoma.
View Article and Find Full Text PDFCase Rep Womens Health
December 2024
Teaching Hospital Peradeniya, Sri Lanka.
Dead foetal remains retained within the abdomen following an ectopic pregnancy leads to the formation of lithopedion, a rare entity. A 44-year-old woman sub-fertile for 16 years presented with sub-acute abdominal pain. She had not sought medical help earlier, on account of her religious or cultural beliefs.
View Article and Find Full Text PDFJ Indian Assoc Pediatr Surg
September 2024
Department of Anatomy, All India Institute of Medical Sciences, Hyderabad, Telangana, India.
Background: Fetus-in-fetu (FIF) is an exceedingly rare condition, characterized by a fetal-like or fetiform mass with a calcified vertebral axis surrounded by other organs or limbs. This systematic review was conducted to comprehensively analyze the clinicopathological attributes, management strategies, and prognosis of FIF to consolidate existing knowledge on FIF.
Methodology: Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, a comprehensive search was performed across various electronic databases, using the keywords "fetus-in-fetu," "fetus-ex-fetus," "homunculus," or "fetiform teratoma" to look for published articles until December 2023.
Radiol Case Rep
April 2024
Department of Radiodiagnosis, AIIMS Bhopal, Bhopal, Madhya Pradesh, India.
Fetus-in-fetu (FIF) is a rare congenital anomaly in which a malformed parasitic twin develops within the body of a live fetus or child. Abdominal teratoma, a type of germ cell tumor, can be a great imaging mimicker of FIF and vice-versa, as they both can present as a heterogeneous mass with calcifications and a fat component. Radiological differentiation of these 2 entities should be made because of the difference in surgical planning and treatment options.
View Article and Find Full Text PDFEuropean J Pediatr Surg Rep
January 2024
Department of Paediatric surgery, Chris Hani Baragwanath Academic Hospital, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa.
A fetiform sacrococcygeal teratoma (homunculus) is a highly differentiated subgroup of mature cystic teratoma that resembles a malformed fetus. These tumors originate at the base of the coccyx and may vary in their intrapelvic and extrapelvic extent and location. It is important to differentiate this anomaly from fetus-in-fetu which has a higher degree of structural organization.
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