We report a case of an abdominal mass in a newborn girl containing a f
etus in fetu and two teratomas. Obstetrical sonography revealed the ab
normality at 28 weeks of gestation. Post-natal LTS examination suggest
ed the diagnosis of a fetus in fetu upon the finding of a vertebral co
lumn and fetal skeletal bones, US also showed two other rounded masses
connected to the main lesion by vascular bundles, Preoperative MRI ex
amination supplied further information regarding tissue composition an
d vascularisation of the mass lesion, The diagnosis was confirmed by p
athological examination. Aetiological factors and radiological diagnos
is of this rare tumour are reviewed and discussed.