Additionally, osseous destructive change and associated low T2 signal soft tissue involving the right anterior sphenoid sinus and adjacent ethmoidal
septa was noted.
 Bolger et al reported this pneumatisation in 53% of the sinus patients, as an extension of the anterior air cells (55%) or posterior (45%) ethmoidal
in 2003 postulated four criteria for poor visual prognosis in ITON: loss of consciousness, blood in ethmoidal
air sinuses, absence of improvement of VA after 48 hours of starting steroid therapy, and age above 40 years.
Caption: FIGURE 1: (a) Cranial X-ray showed a fragment of a dagger located intraorbitally in the superior and nasal quadrant and intracranially in the ethmoidal
sinus in left site (including ruler for measurement).
The AN cells were defined as the anterior ethmoidal
cells pneumatized from the frontal recess, as previously defined by Messerklinger (4).
CT of the brain and paranasal sinuses showed a solid lesion affecting the ethmoidal
cells, nasal cavity, and right sphenoid sinus and extending as far as the floor of the sella turcica on the right side, causing erosion; there were no signs of pituitary involvement.
The right maxillary and anterior ethmoidal
sinus are opacified and the peripheral mucosa thickened.
Frontal herniations are shown to be accompanied with osseous deformities in nasal conchae and ethmoidal
bones (Ohba et al., 2008).
1): In this stage, elements of three regions of the chondrocranium are observed: the anterior ethmoidal
region, the intermediate orbitotemporal region, and the posterior occipital region (Table 1).
The origin of the orbital mucocele was frontal sinus in 6 patients (54.5%), ethmoidal
sinus in 3 patients (27.3%), and maxillary sinus in 2 patients (18.2%).
Twelve areas were specifically looked at for anatomical variations (Table 1) including; Type of skull base, Anterior ethmoid artery, Agger nasi cells, Haller cells, asymmetry in anterior ethmoidal
and onodi cells.
There are four pairs of paranasal sinuses of forensic interest in the skull, namely, frontal, maxillary, sphenoidal and ethmoidal
sinuses (NAMBIAR et al., 1999).