Calcitonin-Secreting Neuroendocrine Carcinoma of Larynx with Metastasis to Thyroid

Figure 3

(a) Larynx, TTF-1 stain ×400: weak (light brown) nuclear staining of tumor cells. (b) Thyroid, TTF-1 stain ×400: weak (light brown) nuclear staining of tumor cells with strong (dark brown) nuclear staining of normal thyroid epithelium.

(a)

(b)