Introduction: Brain abscess is accumulation of pus in brain parenchyma. Predisposing factors include head trauma and spreading the inflammatory process from remote locations or from surroundings. The most common location is the frontal lobe. Frequent pathogens that cause paediatric BA are S. pneumoniae, viridans and S. aureus. Headache is a common symptom. The first imaging test performed is head CT. This is crucial for correct diagnosis and treatment. BA is a serious health problem, with a mortality rate up to 24%. Case Report: The medical history is presented of an 8-year-old female patient who was admitted to hospital in a serious general condition with non-specific symptoms. Imagining diagnostics showed inflammatory changes of the sinuses communicating with the right orbit and nasal cavity. Broad-spectrum antibiotic therapy was administered, but later the patient’s condition deteriorated. The lesion had progressed. She underwent endoscopic surgery, but a few days later her condition was again serious, despite regression in imaging studies. Key words: inflammation, complication, sinusitis, brain abscess