*This is a 61 year old man with a left facial droop and dysathria


Diagnosis: Metastasis
Differential Diagnosis:

• Metastasis
• Abscess (infection)
• Glioma
• Infarction
• Contusion
• AIDS lymphoma
• Demyelinating disease
• Resolving Hematoma

MRI of the brain shows a solitary intra-axial 3.2 cm mass in the right frontal lobe. The center of the mass is hypointense on T1-weighted images and hyperintense on T2-weighted images representing either a cystic component or central necrosis

After gadolinium administration, the lesion demonstrates peripheral ring-like enhancement with a nodular, irregular wall. A large amount of abnormal T1-weighted hypointensity and T2-weighted hyperintensity surrounds the lesion consistent with vasogenic edema