A large mass lesion in the left cerebral hemisphere with marked adjacent vasogenic edema simulates a tumoral mass. The thin, regular peripheral wall enhancement generally argues against a tumor, favoring infection. Calcification can be seen in both tumors and infectious lesions.

Tuberculomas (confirmed pathologically) are usually smaller but can be this large.

Acknowledgements: Dr Ali Shraf Al-dine & Dr Yousif Al-madani (neurosurgeon), Dr Abdulatif Magram (radiology specialist), Dr Wael Al-Absi (pathology specialist)