Fetus-in-fetu: A case report and review of the literature

Fetus in Fetu…A Rare Case Report!!!

“…Fetus-in-fetu is usually single, however possibly multiple, aberration of monozygotic diamniotic twinning in which unequal division of the totipotent inner cell mass of the developing blastocyst leads to the inclusion of a smaller cell mass within a maturing sister embryo. [1] Thakral et al [2] reported equal male and female prevalence but Patankar et al [3] and Federici et al [4] noted a 2:1 male predominance. The common presentation of fetus in fetu is most commonly in the abdomen, almost 80% in the retroperitoneum followed by abdomen, scrotum, cranium, kidneys, adrenals, mediastinum, and lymph nodes etc.…”

Giant retroperitoneal fetus-in-fetu: An unusual cause of respiratory distress

“…[1] Majority of these cases occur in children younger than 18 months with the chief complaint of an abdominal mass. [4] As far as location is concerned, it is predominantly retroperitoneal in 80% of cases, [5] but could also be found in atypical locations, such as skull, [6] scrotum, [7] sacrum, [8] mouth, [9] and adrenal gland. [10] The fetus is usually single in 88% of the cases, although upto five fetuses have been found in the skull of a newborn.…”

“…[14][15][16] Early and complete resection of the fetus and associated membranes is expected to offer complete cure. [4] The fetus is typically suspended by a pedicle within a sac containing fluid or vernix caseosa. Definite vascular connections to the host are rarely seen and if present arise from superior mesenteric artery or inferior mesenteric artery.…”

Fetus in fetu presenting as suprarenal mass: a case report

“…6,8 Other atypical sites include intracranial, oropharynx, neck, adrenal gland, mediastinum, lungs, ovary and sacrococcygeal region. 5,[8][9][10][11][12][13] Post-natal ultra sonogram and CECT abdomen were suggestive of a left supra renal cystic mass in our patient.…”

“…4 It has almost equal incidence in both male and females. 5 Usual presentation is intra abdominal mass, mostly in retro peritoneum. 6 X-ray, USG followed by CECT/MRI abdomen are the usual investigations.…”