Fig. 3
From: Metastasis of colon cancer to the thyroid and cervical lymph nodes: a case report
Histopathological and immunohistochemical (IHC) staining findings of the cervical lymph nodes. a Microscopic findings show cribriform nests of tall columnar cells in one of the affected lymph nodes (H&E stain, ×400). b IHC staining for TTF-1 reveals negative staining in the tumor cells. c IHC staining for cytokeratin 7 shows negative staining in the tumor cells. d IHC staining for cytokeratin 20 shows cytoplasmic positivity in the tumor cells