Clear cell odontogenic carcinoma (CCOC) is a very rare malignant neoplasm of jaw, with a significant clear cell component. It is nearly three times as common in the mandible with distinct female predominance. Past, identified as locally invasive tumor, CCOC is now considered to be malignant neoplasm, showing distant and regional lymph node metastasis. CCOC is histopathologically characterized by large glycogen-rich clear cells, often intermixed with eosinophilic cells. When diagnosing CCOC, ruling out salivary gland tumors, such as mucoepidermoid carcinoma or clear cell adenocarcinoma is important because they have overlapping histologic features with CCOC. Here in, we report a case of CCOC involving the right maxillary sinus of a 72-year-old female.

Ⅰ. INTRODUCTION
 Ⅱ. REPORTS OF CASE
 Ⅲ. DISCUSSION
 Ⅳ. REFERENCES

• 강경림(Department of Oral Pathology, School of Dentistry, Seoul National University) | Kyung Rim Kang
• 신의정(Department of Oral Pathology, School of Dentistry, Seoul National University) | Wui Jung Shin
• 조영아(Department of Oral and Maxillofacial Pathology, School of Dentistry, Kyung Hee University) | Young Ah Cho
• 윤혜정(Department of Oral Pathology, School of Dentistry, Seoul National University) | Hye Jung Yoon
• 이재일(Department of Oral Pathology, School of Dentistry, Seoul National University) | Jae Il Lee
• 홍삼표(Department of Oral Pathology, School of Dentistry, Seoul National University) | Sam Pyo Hong
• 홍성두(Department of Oral Pathology, School of Dentistry, Seoul National University) | Seong Doo Hong correspondence