Thyroid Cytopathology Reporting by the Bethesda System: A Two-Year Prospective Study in an Academic Institution

Figure 7

(a) Papillary thyroid carcinoma. Photomicrograph showing highly cellular specimen composed of numerous monolayer sheets and occasional papillary-like fragments and “stringy,” “ropy” colloid (arrow) (Smear, Papanicolaou stain, 400x magnification). (b) Papillary thyroid carcinoma. Photomicrograph showing “stringy” colloid (thick arrow) and intranuclear cytoplasmic inclusions (thin arrow) (Smear, Giemsa, 1000x magnification). (c) Papillary thyroid carcinoma. Photomicrograph showing multinucleated giant cell engulfing sticky colloid (arrow) in a case of papillary thyroid carcinoma (Smear, Papanicolaou stain, 400x magnification). (d) Papillary thyroid carcinoma. Photomicrograph showing longitudinal nuclear grooves (thin long arrow) and micronucleoli (thin short arrows) (Smear, Papanicolaou stain, 1000x magnification). (e) Papillary thyroid carcinoma, oncocytic variant. Photomicrograph showing the neoplasm composed throughout of oncocytic (Hürthle-like) cells that have abundant granular cytoplasm. Intranuclear cytoplasmic inclusions are visible (arrow) (Smear, Giemsa, 1000x magnification).

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