Objective: To report a case of a large sinus Haller cell that presented with chronic rhinosinusitis and proptosis and its surgical management. Method: Design: Case Report Setting: Tertiary Government Hospital Participants: One (1) Results: A 34-year-old lady with proptosis and secondary sinusitis due to a giant infected Haller cell was successfully treated by lateral rhinotomy approac... https://seisukeknifes.shop/product-category/apron/