Local cerebral lesion with ring on CT scan is caused by:
A i.e. Toxoplasmosis Conditions causing ring-enhancement with CT (contrast) - ToxoplasmosisQ - Cysticercosis - TuberculomaQ - Pyogenic abscess - Glioma metastasis - Craniopharyngeoma - Gaint aneurysm
Toxoplasmosis
Intracranial haemorrhage
Cysts
Hamaoma