Paranasal sinus cancers comprise about 0.3% of all cancers and 80% of these lesions arise in the maxillary sinus. A masquerading primary sinus tumour represents a therapeutic challenge as most patients with maxillary antrum cancer are diagnosed with advanced disease. However, distant metastases rarely occur. We examined the clinical outcome of patients with antrum neoplasms. Medical records were obtained for all patients diagnosed with a sinus malignancy between July 2009 and January 2014. During this period, 41 patients with maxillary tumours were treated, among which 9 patients received a maxillectomy. There were 21 male and 20 female patients. All patients underwent computed tomography or magnetic resonance imaging. The most common complications were postoperative epistaxis and swallowing difficulty. The treatment of maxillary antrum tumours is complicated and needs advancements to improve early presentation, timely diagnosis, and better management outcomes.