Fig. 10.

Single CT slice analysis of facial features of the non aCh18 cyclopia perfecta fetus at 35 weeks. (A) Adjacent mediolateral sections to emphasize the presence of the (1) orbital plate of frontal bone, (2) frontal process, (3) nasal septum, (4) centrally located optic nerve, (5) pituitary (appears gray surrounded by white sella turcica of the body of the sphenoid) and (6) enlarged foramen magnum. (B) Anteroposterior sections are shown to emphasize centrally located nasal structures, including radiodense septum/conchae, and radiolucent maxillary sinuses on either end.