Clavicular Metastasis as an Initial Presentation of Papillary Thyroid Cancer

Figure 3

FNA of right neck mass shows cohesive nests of neoplastic thyroid tissue with overlapping nuclei and nuclear pleomorphism. The absence of colloid and macrophages is noted, and a subset of the cells shows nuclear pseudonuclear inclusions (arrow) supporting the diagnosis of papillary thyroid carcinoma (PAP stain, 200x).