Squamous Cell Carcinoma of the Thyroid as a Result of Anaplastic Transformation from BRAF-Positive Papillary Thyroid Cancer

Figure 1

(a) H&E staining of the thyroid bed and paratracheal lymph node. Top row, from left to right: (i) squamous cell carcinoma in the thyroid bed; (ii) keratin pearls of squamous cell carcinoma in higher power. Bottom row, from left to right: (i) paratracheal lymph node showing papillary feature of thyroid cancer; (ii) tall cell areas showing mitotic figure in higher power. (b) From left to right, low power showing papillary thyroid cancer and squamous cell cancer in the same field adjacent to each other.

(a)

(b)