Immunocytochemistry: (a-b)Tg: (a) FTC, tissue section IC x200 (b) PTC tissue section IC x200; inset FNA smear ICx400. (c) Cytoplasmic Cal expression in MTC, tissue section IC x200, inset FNA smear IC x400. (d-f) Cytoplasmic Bcl-2 staining: (d) FTC, FNA smear IC x100; (e) PTC, FNA smear IC x400, inset – tissue section IC x200; (f) MTC, FNA smear IC x400, inset – tissue section IC x200. (g-i) Focal nuclear positivity for p63 in PTC (g) FNA smear IC x400; (h) tissue section ICx200; (i) PTC with cystic change, tissue section IC x 200.