Diagnosis and treatment of primary pulmonary enteric adenocarcinoma: Report of Six cases

Table 3 Immunohistochemical results of six patients with pulmonary enteric adenocarcinoma

Case	CDX2	CK20	CK7	TTF-1	Napsin A	ALK-lung	Others
1	+	+	-	-	-	Not tested	Not tested
2	-	-	+	-	-	Not tested	SPA (-)
3	+	Not tested	-	-	Not tested	Not tested	CK19 (+), SPA (-)
4	+	+/-	+	-	-	-	p63 (-), CK5/6 (-), PAX8 (-)
5	+	Not tested	+	-	-	-	CD20 (-), MUC2 (-)
6	+	-	+	-	-	-	Ki-67 (low)

CDX2: Caudal type homeobox transcription factor 2; CK: Cytokeratin; TTF-1: Thyroid transcription factor-1; Napsin A: Novel aspartic proteinase of the pepsin family A; ALK: Anapastic lymphoma kinase; SPA: Staphylococal protein A; PAX8: Paired box gene 8; MUC2: Mucin 2; CD20: Cluster of differentiation 20; Ki-67: Antigen identified by monoclonal antibody Ki-67; p63: Protein 63.