Non-keratinizing squamous cell carcinoma (NKSCC) is a rare malignancy of the nose and paranasal sinuses which is characterized by a unique anastomosing ribbon-like growth pattern with absent of limited maturation and keratinization. NKSCC accounts for 10-27% of sinonasal squamous cell carcinomas and some of the NKSCCs are reported to be associated with high risk-HPV infection. Advanced lesion can involve the oral cavity with oral symptoms of palatal bulging, surface ulceration mimicking salivary gland tumors. Herein, we report a case of NKSCC of a 46-year old male, which clinically presented as a bulging mass on the mid palate and mimicked a palatal salivary gland tumor. We reviewed the clinical and histopathological considerations required for differential diagnosis of sinonasal carcinoma involving the oral cavity.

• 이환규(연세대학교 치과대학 구강악안면외과학교실) | Hwangyu Lee (Department of Oral & Maxillofacial Surgery, Yonsei University College of Dentistry)
• 한다울(연세대학교 치과대학 구강병리학교실) | Dawool Han (Department of Oral Pathology, Yonsei University College of Dentistry)
• 김현민(연세대학교 치과대학 구강악안면외과학교실) | Hyounmin Kim (Department of Oral & Maxillofacial Surgery, Yonsei University College of Dentistry)
• 김동욱(연세대학교 치과대학 구강악안면외과학교실) | Dongwook Kim (Department of Oral & Maxillofacial Surgery, Yonsei University College of Dentistry) Correspondence