• Annie Vu, Amanda Schoonover, Jackson Lanphear, and Christopher Benner.
• Michigan State University College of Human Medicine, Grand Rapids, MI, USA.
• Am J Emerg Med. 2023 Mar 1; 65: 218.e5218.e7218.e5-218.e7.

BackgroundUpper respiratory infections can be complicated by acute bacterial sinusitis in pediatric patients, and usually resolve with antibiotic therapy (DeMuri and Wald, 2011). However, intracranial complications such as: epidural abscess, meningitis and more rarely cerebral sinus venous thrombosis (CSVT) can occur (Germiller et al., 2006). We report an unusual case of sinusitis complicated by an epidural abscess and later a CSVT in a young previously healthy patient.Case DescriptionA 12-year-old female presented to the emergency department with a 9-day history of headaches and a 3-day history of fevers, rigors, nasal congestion and nonproductive cough. She later tested positive for Covid-19. CT and MRI showed extensive paranasal sinus disease and a right frontal epidural collection. MRV showed no sinovenous thrombosis. Washout and burr hole drainage alongside endoscopic sinus surgery was completed and post-op imaging showed evacuation of the epidural abscess with a small residual collection. Six days after the procedure, she experienced worsening headaches and MRV showed a nonocclusive thrombus in the superior sagittal sinus, which was treated with anticoagulation therapy. Upon follow-up, the patient showed improvement of the sinusitis, abscess and thrombus.ConclusionThis specific case encourages clinicians to be aware of complications, though rare, and to diagnose and treat sinusitis cases quickly. It is also important to be aware of any risk factors for thrombus formation, including an inflammatory and hypercoagulable state. In the patient's case, it was perceived that the CSVT was provoked due to the patient's Covid-19 infection, abscess, and sinus disease.Copyright © 2022 Elsevier Inc. All rights reserved.

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