Cervical neck dissection is a frequent technique during treatment for oral squamous cell carcinoma (SCC). Occasionally, specimens harvested as cervical lymph nodes reveal thyroid tissue and need differentiation with metastatic thyroid cancer and ectopic thyroid tissue. Here, we report a case of an ectopic thyroid tissue with lymphocytic thyroiditis mimicking thyroid cancer metastasis at the cervical lymph node.

Abstract
 Ⅰ. INTRODUCTION
 Ⅱ. CASE REPORT
 Ⅲ. DISCUSSION
 REFERENCES

• 권순모(연세대학교 치과대학 구강악안면외과학교실) | Sunmo Kwon (Department of Oral and Maxillofacial Surgery College of Dentistry, Yonsei University)
• 송상현(연세대학교 치과대학 구강악안면외과학교실) | Sang Hyun Song (Department of Oral and Maxillofacial Surgery College of Dentistry, Yonsei University)
• 조은애산드라(연세대학교 치과대학 구강병리학교실, 연세대학교 치과대학 구강종양연구소) | Eunae Sandra Cho (Department of Oral Pathology College of Dentistry, Yonsei University, Oral Cancer Research Institute College of Dentistry, Yonsei University)
• 김현실(연세대학교 치과대학 구강병리학교실, 연세대학교 치과대학 구강종양연구소) | Hyun Sil Kim (Department of Oral Pathology College of Dentistry, Yonsei University, Oral Cancer Research Institute College of Dentistry, Yonsei University)
• 남 웅(연세대학교 치과대학 구강악안면외과학교실) | Woong Nam (Department of Oral and Maxillofacial Surgery College of Dentistry, Yonsei University) Correspondence