28. Hashimoto thyreoiditis

Staining: HE

Organ: Thyroid

Characteristics:

Many secondary lymphoid follicles
Hürthle cell metaplasia

Hürthle cells are metaplastic follicular cells. They have broad, eosinophilic cytoplasm with atypical nuclei and distinct cell borders. These cells are found in only a small part of the slide.

There is normal thyroid in the periphery of the slide.

Diagnosis: Hashimoto thyroiditis

Risk factors:

Young females

Theory:

Nothing special.