Fig.01 Thyroid adenoma. Moderate cytoplasmic positivity and luminal accumulation of thyroglobulin positive masses.

Fig.02 Thyroid adenoma. Moderate cytoplasmic positivity and, in addition, luminal thyroglobulin positive masses.

Fig.03 Thyroid adenoma with strong cytoplasmic thyroglobulin positivity.

Fig.04 Thyroid adenoma with low cytoplasmic thyroglobulin positivity and accumulation of highly thyroglobulin positive masses in the follicular lumina.

Fig.05 Thyroglobulin negative anaplastic thyroid carcinoma with sarcomatoid growth habit.

Fig.06 Follicular thyroid carcinoma with luminal thyroglobulin staining.

Fig.07 Follicular thyroid carcinoma with focal thyroglobulin staining in approximately 20% of the cells.

Fig.08 Weak to moderate cytoplasmic thyroglobulin staining in a follicular thyroid carcinoma.

Fig.09 Follicular thyroid carcinoma. Weak cytoplasmic thyroglobulin staining and accumulation of heavily stained luminal secretions.

Fig.10 Follicular thyroid carcinoma with strong cytoplasmic thyroglobulin staining.

Fig.11 Follicular thyroid carcinoma without thyroglobulin staining.

Fig.12 Largely thyroglobulin negative follicular thyroid carcinoma with only slight weak staining.

Fig.13 Papillary thyroid carcinoma with predominantly luminal thyroglobulin staining but also weak cytoplasmic positivity

Fig.14 Papillary thyroid carcinoma with luminal thyroglobulin staining and moderate cytoplasmic positivity.

Fig.15 Papillary thyroid carcinoma with mosaic-like cytoplasmic staining. Thyroglobulin negative, weak and strong positive cells are mixed.

Fig.16 Thyroglobulin-positive papillary thyroid carcinoma with mosaic-like cytoplasmic staining. Between slightly and moderately stained cells, cytoplasmic thyroglobulin-positive cells are repeatedly interspersed.

Fig.17 Thyroglobulin negative papillary thyroid carcinoma.

Fig.18 Papillary thyroid carcinoma with strong thyroglobulin staining predominantly located at the apical (near-the-lumbar) cell pole.

Fig.19 Papillary thyroid carcinoma with predominantly luminal thyroglobulin staining, diffuse weak cytoplasmic positivity and herd-like recognizable apical accentuated thyroglobulin staining.

Fig.20 Thyroglobulin negative medullary thyroid carcinoma.

Fig.21 Medullary thyroid carcinoma without thryroglobulin staining.

Fig.22 Medullary thyroid carcinoma. Thyroglobulin negative.