Cerebral nocardiosis characterized by magnetic resonance spectroscopy in vivo.

We describe a patient with multiple cerebral lesions that initially were believed to be tumor metastases but were later found to be caused by Nocardia asteroides, after magnetic resonance spectroscopy (MRS) findings suggested that the lesions were infective in origin. This case report demonstrates the ability of MRS, a noninvasive imaging modality, to aid in the diagnosis of brain infection.