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There is evidence of previous left frontal craniotomy surgery with a calvarial defect.
There is diffuse irregular bone expansion predominantly involving the left sphenoid bone which extends to involve the zygoma and maxilla. There is obliteration of the left maxillary antrum. The left globe is absent from previous enucleation.
There is preservation of the skull base foramina on the left. There is sclerosis of the mastoid air cells with soft tissue thickening of the middle ear cleft.
There is associated underlying encephalomalacia involving the left frontal lobe and temporal lobe with associated negative mass effect on the left lateral ventricle.
There is no focal intracranial lesion. The remainder of the calvarium and skull base are normal in appearance. There is no midline shift. There is no extra-axial blood or fluid on the left side.