<prompt> A 40yr old male presented with altered mental status, seizures and vomiting. He has no ho fever, neck stiffness. On CECT and MRI ring enhancing lesion at gray white interface is seen. General hygiene was poor and he has multiple dental caries. What is the next best step in management of this patient?Urgent parenteral antibioticsPlacement of ICP monitorLumbar punctureCraniotomy  <response>: Most likely diagnosis is brain abscess as - There is absence of signs of meningeal irritation fever, vomiting, neck stiffness Is acquired by either contiguous spread from adjacent structure or hematogenous route Common sites of infection are - ear infections, paranasal sinuses dental caries. CECT MRI - reveal ring enhancing lesion at gray white interface. Rx - Appropriate antibiotic therapy To relive mass effect, aspirationsurgery can be done 