Sinusitis are infectious-inflammatory processes of the pneumatic paranasal cavities. Among the complications of acute sinusitis, we can find intracranial involvement, with meningoencephalitis and even extra or subdural abscesses. In this article we describe a case of meningoencephalitis and subdural empyemas associated with acute frontal sinusitis in a 12-year-old child who presented to the emergency room referring altered level of consciousness and right hemiparesis. Computed tomography scan and brain magnetic resonance imaging studies were performed, evidencing left frontal sinus occupation, accompanied by extensive hypercaptant defects in the left cerebral hemisphere, with formation of subdural empyemas at the left frontal level, parafalcian and in the tentorial area. He was hospitalized for intravenous antibiotic treatment, and given the lack of response to medical treatment, a DRAF IIa sinus surgery and drainage of the frontal abscess, ethmoidectomy and left middle meatotomy with drainage tube to the nasal cavity were performed. Complications at the central nervous system are serious and must always be kept in mind, sometimes requiring surgical drainage with an endonasal or open approach