Round nuclei • Inconspicuous nucleoli • Moderate amount of cytoplasm  

• May be geometric or cracked, Swiss cheese, bubble gum (thick, dense in papillary carcinoma)

Description

Description

• Low cellularity • Small monolayered, honeycombed sheets of evenly distributed follicular cells and single cells • Colloid in the background • +/- Macrophages

• Round nuclei • May have conspicuous central nucleoli • Abundant amounts of granular cytoplasm

Draining thyroid cyst – therapeutic and diagnostic  

Abundant thin colloid with scattered small groups of follicular cells

• Cellular
• Little or no colloid in the background (colloid may appear as dense, globular, bubble gumlike – uncommon feature)
• Cells arranged in papillary, monolayer tissue fragments, clusters or dispersed as single cells
• Well-formed papillary clusters that appear as 3-D finger-like