<prompt> Basal exudates, infarcts and hydrocephalus are findings observed in Brain imagine studies. The most likely diagnosis isTubercular MeningitisViral MeningitisHerpes encephalitisCerebral Malaria  <response>: Harrisons textbook of internal medicine 17th edition. Imaging studies MRI,CT scan may show hydrocephalus and abnormal enhancement of basal cisterns or ependyma . CT and MRI reveals contrast enhanced ring lesions ,but biopsy necessary to establish the diagnosis . 