<prompt> Local cerebral lesion with ring on CT scan is caused by:ToxoplasmosisIntracranial haemorrhageCystsHamaoma  <response>: A i.e. Toxoplasmosis Conditions causing ring-enhancement with CT contrast - ToxoplasmosisQ - Cysticercosis - TuberculomaQ - Pyogenic abscess - Glioma metastasis - Craniopharyngeoma - Gaint aneurysm 