Figure 1From: Solitary mediastinal lymph node metastasis in rectosigmoid carcinoma: a case reportColonic tissue in paratracheal nodes. Paratracheal nodal involvement by metastatic adenocarcinoma (A) [H&E, 200×]. The tumor cells are strongly positive for CK20 (B) [400×], weakly positive for CK7 (C) [400×]. Micrometastasis in another paratracheal lymph node (D) [400×].Back to article page