1. 1. Makay O, Kaya T, Ertan Y, et al. Primary squamous cell carcinoma of the thyroid: report of three cases. Endocr J 55: 359-364, 2008.
2. 2. Kunisue H, Mikami Y, Tanaka K, et al. Metastatic papillary thyroid carcinoma of the submandibular lymph nodes with extensive squamous metaplasia: report of a case. Surg Today 33: 751-754, 2003.
3. 3. Ko YS, Hwang TS, Han HS, Lim SD, Kim WS, Oh SY. Primary pure squamous cell carcinoma of the thyroid: report and histogenic consideration of a case involving a BRAF mutation. Pathol Int 62: 43-48, 2012.
4. 4. Kitahara S, Ito T, Hamatani S, Shibuya K, Shiba T. Thyroid papillary carcinoma recurring as squamous cell carcinoma: report of a case. Surg Today 36: 171-174, 2006.
5. 5. Eom TI, Koo BY, Kim BS, et al. Coexistence of primary squamous cell carcinoma of thyroid with classic papillary thyroid carcinoma. Pathol Int 58: 797-800, 2008.