Fetus in fetu is a rare cause of abdominal mass in infants wherein a parasitic twin grows inside a host. The true etiology is unclear. Various theories have been postulated. We report two cases of retroperitoneal fetus in fetu in female infants.
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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 PDFFetus in fetu (FIF) is a rare anomaly characterized by the presence of a monozygotic twin that becomes incorporated into the abdomen of its sibling during fetal development. FIF is a rare congenital condition typically identified in infancy. We present a case of FIF in a 16-year-old male, which is an extremely rare presentation during adolescence.
View Article and Find Full Text PDFDemystifying Fetus-in-fetu: A Systematic Review of Its Clinical and Pathological Attributes.
J 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.
Intra-abdominal retroperitoneal fetus in fetu: A case report.
Radiol Case Rep
November 2024
Radiology Department, French Medical Institute for Mothers and Children (FMIC), Kabul University of Medical Sciences (KUMS), Kabul, Afghanistan.
Fetus in fetu (FIF) is a rare abnormality where a vertebrate parasitic fetus develops inside the body of another normally developing fetus. It is distinct from teratomas, tumors composed of cells from multiple germ layers and have malignant potential. Symptoms of FIF arise from the mass effect, causing abdominal distension, feeding difficulties, and pressure effects on organs.
View Article and Find Full Text PDFAn infant with testicular Fetus-in-fetu in the abdominal cavity: rare case report.
Front Pediatr
August 2024
Department of Pediatric Surgery, Zhongnan Hospital of Wuhan University, Wuhan, China.
Article Synopsis
- Fetus-in-fetu (FIF) is a very rare condition where a malformed twin develops inside another fetus, often without brain tissue, and can harm the host's organs.
- A case of a four-month-old boy showed a pelvic mass indicating FIF, which was confirmed through surgery and pathology revealing skin, cartilage, and gastrointestinal tissues but no testicular tissue.
- The report emphasizes the importance of prompt surgical removal for FIF and suggests ongoing monitoring post-surgery using ultrasound and tumor markers, as its causes remain unknown.
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