Figure 1From: Orocervical foetus-in-foetu with prenatal sonographic diagnosis: a case report Sonograms of the foetal neck mass, midline longitudinal scan (left image) and left paramedian scan (right image), showing a large cyst that resembles a gestational sac (notched arrow). Note the central irregular solid tissue containing long bone (white arrow) and vertebral bone (curved arrow).Back to article page