New brain lesions in a patient with sarcoidosis: is it neurosarcoidosis?

A 45-year-old woman with pulmonary sarcoidosis diagnosed 5 years previously, who was on treatment with prednisone and methotrexate for 1year, developed partial seizure with secondary generalization. MRI showed three non-cavitary enhancing lesions in the cerebello-occipital region. These lesions were presumed to be neurosarcoidosis.