Fig. 3

Pathological findings of thyroid composite carcinoma. A, B Follicular carcinoma of left thyroid showed the cancer cells protruding from the tumor envelope like mushrooms (A) with intravascular tumor thrombus (B, 40 ×). C, D Papillary carcinoma of right thyroid presented the cancer cells were arranged in papillary and follicular structures, the cancer cells were tightly arranged and deformed (C, 100 ×). The formation of ground-glass nuclei, nuclear furrows, intronuclear inclusions and gritty bodies were observed (D, 200 ×)