Fetu in fetus. This report Apr 2, 2014 · Background Fetus in fetu is a rare congenital anomaly and is defined as a monozygotic twin incorporated into the abdomen of its sibling during development. Sep 1, 2025 · In this discussion, let’s gain a deeper understanding of what Fetus in Fetu (FIF) truly is, including its causes, symptoms, and methods for identification, as well as various techniques for treatment to support suffering parents and newborns. Case presentation We describe the clinical characteristics of two patients, a thirty-months old boy . An early example of the phenomenon was described in 1808 by George William Young. Fetus in fetu (or foetus in foetu) is a rare developmental abnormality in which a mass of tissue resembling a fetus forms inside the body of its twin. It is most frequently located in retroperitoneal area; however, it has been reported in other locations as well. Fetus in fetu is a rare condition which most often presents as a fetiform calcified mass in the abdomen of its host, fetus or newborn. Fetus in fetu (FIF) is an extremely rare condition in which malformed fetus is found most commonly in the retroperitoneum of living twin. In the late eighteenth century, German anatomist Johann Friedrich Meckel was the first to described fetus in fetu, which translates to “fetus within fetus. Fetus in fetu is a rare condition that has been defined as the presence of one of the twins in the body of the other. Epidemiology Fetus-in-fetu is v The term “fetus in fetu” was first described by Johann Friedrich Meckel in 1800 and defined by Willis in 1953 as a rare condition where a malformed parasitic twin resides in the body of its host. Ultrasonography and computed tomography Jun 19, 2025 · Fetus-in-fetu is an extremely rare abnormality that occurs secondary to abnormal embryogenesis in a monochorionic diamniotic pregnancy where a non-viable fetus becomes enclosed within a normally developing fetus. 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. Fetus in fetu is often overlooked in the differential diagnosis of an abdominal mass. Over time, the smaller fetus may even become absorbed within its larger twin, effectively disappearing into it. It mainly occurs intraabdominal. We report a case of 8-month-old girl with history of abdominal distension. ” Fetus in fetu is thought to result from Nov 13, 2024 · The larger fetus absorbs more nutrients from the mother, thriving as it grows, while the smaller one is deprived. Unlike teratomas, fetus in fetu is a benign disorder. Fetus-in-fetu (FIF) is an extremely rare anomaly of monochorionic, diamniotic twins in which a malformed fetus resides in the body of its normal sibling during development. Fetus-in-fetu (FIF) is a rare embryological anomaly in which an encysted fetiform mass develops within the infant or adult host body. [2] However, there is controversy as to whether fetus in fetu is a distinct entity or represents a highly organized teratoma. This natural but rare process is believed to be a primary factor behind Fetus in Fetu cases. Unimaginable as it seems, Fetus-in-fetu (FIF) is a rare congenital anomaly in which a fetus grows inside the body of its twin. Jan 29, 2025 · Sounds like fiction, right? This unusual phenomenon is called fetus-in-fetu, one of the rarest medical cases known to humankind. It occurs in about 1 in 500 000 live births and less than 200 cases have been reported in medical literature. May 30, 2012 · Fetus in fetu is a rare variety of parasitic twins , where the developmentally abnormal parasitic twin is completely encapsulated within the torso of the otherwise normally developed host twin. gzrs ie gldhz zqwu dvzx 96s 1xsaag8 yx8c acc4 cjp