Right fronto-ethmoidal encephalocele with prolapse of the anterior right gyrus rectus through the floor of the right frontal sinus, through the anterior ethmoid air cells with bulging of the dural covering into the nasal cavity. The meningoencephalocele appears to contain the right orbitofrontal artery. Associated gliosis in the adjacent frontal lobe noted.
Mucosal thickening within the right frontal sinus, with underlying osteoma, and the ethmoid air cells and maxillary sinuses bilaterally. The hyperdense fluid in the frontal sinus on CT is hypointense to the mucosal thickening on T2 and relatively hyperintense on T1. FLAIR hyperintense deep and periventricular white matter lesions are of a number greater than expected for the patient's age.
Foci of blooming artefact on SWI in the medial right temporal lobe and the right frontal lobe adjacent to the anterior horn of the lateral ventricle in keeping with previous microhaemorrhage. Previous mini right parietal craniotomy with underlying gliotic tract extending to the right lateral ventricle. Previous resection of the posterior portions of the middle and inferior turbinates.