Female, 58 years old, with sarcoid, outside PET/CT showing a lesion in the brain. No enhancing lesions are identified intracranially. However, fairly extensive patchy T2 hyperintensity is seen in the periventricular and subcortical white matter bilaterally. No evidence of edema or mass effect is observed. The ventricles are normal in size. The sulci are slightly prominent suggesting a degree of parenchymal volume loss.
No specific focal lesions are identified on this examination. However, extensive patchy white matter T2 hyperintensity is demonstrated which could represent the sequelae of lupus, microvascular ischemia or demyelinating disease among other possibilities. Please note that the examination as ordered is a limited surgical planning study. If a complete evaluation is warranted, MRI brain with and without contrast can be ordered. In addition, if the outside PET/CT can be made available and uploaded to PACS, comparison would be helpful to the interpretation.