Another differentiating feature worth mentioning is T2 signal edema-like change in the optic tracts. Edema-like change has so commonly been associated with craniopharyngiomas that this finding has highly suggested a diagnosis of craniopharyngioma.
Imaging findings were significant for a sellar/suprasellar mass with edema along the bilateral optic tracts.
Optic tracts and optic chiasm.The ventral surface of the brain showed little demarcation between the structures.
2-5B), it was about 16.38 mm in length and 8.48 mm in width, It extended dorsally between the caudal pole of cerebral hemisphere rostrally and cerebellum caudally, meanwhile ventrally extended between the optic tract and cerebral hemispheres rostrally and the cerebral peduncles and pons caudally.
The optic lobe neuropils are located within the anterolateral extensions of the brain and are linked to more posterior regions of the protocerebrum via the optic tract [ILLUSTRATION FOR FIGURES 4, 5 OMITTED].
The cephalic sensory input in the cyprid can be summarized as follows: primary nerves from the median eye project to the dorsofrontal neuropil; primary nerves from each compound eye form an optic tract and project to the optic lobe; primary nerves from each frontal filament form a frontal filament tract and project also to the optic lobe; and primary nerves that innervate setae on the antennule project to the deutocerebrum.
Lateral geniculate body: Lateral geniculate body is an oval structure located at termination of optic tracts
. Each geniculate body consists of 6 layers of neurons.
They demonstrate variable enhancement and appear T1 hypointense and T2 hyperintense; this signal intensity can extend along the optic tracts
Together these form the optic tracts
. Once again the division of the fibres from each half of the retina is through the fovea as represented in the field of view by the point of fixation.