Fetus In Fetu Appearing as a Prenatal Neck Mass

Comment on “The Ex Utero Intrapartum Treatment (EXIT) procedure used for airway control in a newborn with cervical fetus-in-fetu: A rare case” by Woodard et al. [Int. J. Pediatr. Otorhinolaryngol. 70 (2006) 1989–1994]

“…The most common site of fetus-in-fetu is the abdominal cavity [1], but it has been reported as intracranial [2], pelvic [3], intrahepatic [4], intrapulmonary [5], mediastinal [6], scrotal [7], testicular [8], and oropharyngeal [9]. The presence of fetus-in-fetu in the neck is very rare and has been reported by Borges et al [10] for the first time. Their case was unique because, up to that time, a case of fetus-in-fetu in the neck had not been reported previously.…”

“…As it is understood from this article it was submitted in May 2006 to this journal. Before that date, a report of cervical fetusin-fetu had been published by Borges et al [10] in the Journal of ultrasound in medicine: official journal of the American Institute of Ultrasound in Medicine. It is understood that the case report by Woodard et al [11] is not the first report of cervical fetus-in-fetu.…”

Foetus-in-foetu

“…The incidence is about 1 in 500,000 births and only about 100 cases have been reported till date in the available literature. 1 Many theories have been postulated to explain the exact pathogenesis of foetus-in-foetu. The commonly accepted theory is that it results from an abnormal diamniotic-monozygotic twin pregnancy in which a smaller cell mass is included within a maturing embryo due to unequal division of the totipotent inner cell mass of the developing blastocyst.…”

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.…”