A man in his 40s presented with six months of bloodstained nasal discharge from his right nostril. Nasal endoscopy showed purulent bloodstained nasal discharge in the right nasal cavity and a mass with an irregular friable appearance in the right middle meatus of the right nasal cavity; the appearance of the septum and left nasal cavity was normal. He underwent a non-contrast computed tomography scan of his sinuses (fig 1).
Computed tomography scan of the sinuses shown in the coronal plane
Biopsy showed cytoplasmic keratinisation, intercellular bridges, and keratin pearls.
What is the most likely diagnosis?
Sinonasal squamous cell …

中文翻译：

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单侧流血鼻涕

一名40多岁的男子从右鼻孔流出了六个月流血的鼻涕。鼻内窥镜检查显示右鼻腔有脓性血迹鼻腔分泌物，右鼻腔的右中鼻道有不规则的脆性肿块。隔膜和左鼻腔外观正常。他对鼻窦进行了无对比计算机断层扫描（图1）。
在冠状位平面
显示的鼻窦的计算机断层扫描显示活检显示细胞质角化，细胞间桥和角蛋白珠。
什么是最可能的诊断？
鼻鼻鳞癌…