Scientific Posters P235 procedure took 30 to 60 minutes with minimal bleeding and no ocular damage. Conclusion: Subperiosteal abscess occurs in approximately 10% to 15% of all acute sinusitis cases. The lreatment consists of intravenous antibiotics and drainage to prevent ocular and cranial injury. Endoscopic treatment of subperiosteal abscess has less morbidity and better cosmetic effect than the external approach.
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