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There is an ill-defined hypoattenuating intra-axial lesion in the anterior aspect right middle frontal gyrus involving cortex and extending into the subcortical and deep white matter of the right frontal lobe. This contains a 9 mm cystic focus and an ill-defined area of hyperattenuation suggestive of calcification.
There is no enhancement following contrast administration.
There is local mass effect: gyral expansion and right frontal lobe sulcal effacement. No midline shift.
Brain parenchyma is otherwise unremarkable.
No evidence of intracranial injury. No skull fracture.
No abnormal enhancement elsewhere in the brain.
Fluid with gas locules in the left maxillary sinus. The remaining visualised paranasal sinuses and mastoid air cells are well-aerated. No bone lesion is demonstrated.
Conclusion: Right frontal intra-axial lesion most probably represents glial series tumour. Calcification, cystic component, and involvement of cortex suggest an oligodendroglial component. Further investigation with MRI should be performed. Findings discussed with the referring ED physician at the time of dictation.