Abstract
We herein report a 49-year-old man who presented with primary squamous cell carcinoma of the thyroid gland (SCC). He complained of a painful anterior neck swelling which had spread quickly. We performed an incision and drainage under a diagnosis of acute thyroiditis. We performed a resection of the necrotic tissue and a right lobectomy which was full of a lot of pus. Under a histopathological diagnosis of SCC, successively concomitant chemo-radiotherapy was performed. However, the primary tumor nevertheless continued to increase in size. A preoperative diagnosis is difficult in patients with SCC, since many cases with SCC are diagnosed to be inflammatory lesions. SCC is therefore thought to have a lower radiation sensitivity in comparison to other head and neck squamous cell carcinomas.