Honeycomb sheet

Variable cellularity (cellular or scant)

Regular nuclear size

Monotonous nuclei

Chronic lymphoid thyroiditis

Autoimmune thyroiditis

Mainly in women, 35~55years of age

Autoimmune origin

Symmetric  firm enlargement

Lymphatic cells with Hürthle cells (Askanazy cells)

Abundant cytoplasm

Thick cytoplasm with eosinophilic granules

Eccentric nuclei

Microfollicle

Enlarged nuclei

Overlaping nuclei

Numerous follicular cells

True papillae, intranuclear groove

Intranuclear pseudoinculsion

Papillary fronds

Non-encapsulated tumor

Invasion of veins is absent

Cervical lymphnode metastasis