Findings:
The left cerebral hemisphere is small in keeping with previously demonstrated atrophy related to cortical surface malformation of Sturge-Weber syndrome.
Blooming artefacts in the left frontal and parietal lobes on the SWI sequence, corresponding to the calcifications seen on CT scan. The remainder of the brain parenchyma is unremarkable. No diffusion restriction.
No obvious midbrain or cerebellar volume loss. No hydrocephalus or midline shift.
The pituitary gland is normal.
The left frontal and ethmoid sinuses are enlarged, when compared to the left side. Mucosal thickening is seen in the paranasal sinuses bilaterally. Partial obliteration of the mastoid air cells is seen on both sides, more significant on the right. The orbits are unremarkable.
No bony abnormality is seen.
Conclusion:
Known pial malformation over the left cerebral hemisphere with volume loss, in keeping with the known Sturge-Weber syndrome. No right-sided cortical abnormality is shown. No crossed cerebellar diaschisis.