Figure 1
From: A case of thyroid metastasis from pancreatic cancer: case report and literature review
Cytological and histological aspects of the nodule. (A) Thyroid fine needle aspiration (Papanicolaou, magnitude 600 X). A high power field showing a cluster of neoplastic cells in a necrotic background. (B) Thyroid core biopsy (hematoxilin and eosin, magnitude 400 X): thyroid tissue infiltrated by poorly differentiated adenocarcinoma (arrows). (C) Thyroid core biopsy (CK19, magnitude 200 X): Strong cytoplasmic positivity in neoplastic cells. (D) Thyroid core biopsy (TTF-1, magnitude 200 X): nuclear positivity in follicular cells.