[Three cases of thyroid cancer, including a component of squamous cell carcinoma]

A squamous cell carcinoma of the thyroid gland is rare and its prognosis is poor. Three cases of a rare thyroid cancer are reported, the first case being an adenosquamous cell carcinoma of a 75-year-old male and the second case being a pure squamous cell carcinoma of a 64-year-old male. These two cases were pathologically diagnosed on autopsy. The overall duration of these two cases was 6 months. The third case involved a 62-year-old male. His pathological diagnosis was a mixed squamous cell carcinoma and an undifferentiated carcinoma. Postoperatively 50 Gy of irradiation was performed. This patient is still alive and has shown no evidence of recurrence for 16 months.