Postsurgical radiation therapy for gastric carcinosarcoma with c-kit expression: A case report

Table 1 Comparison of immunostaining results with reported cases[21]

Tested antigens	Present CS case		Reported GIST cases	Reported CS cases
	Carcinoma	Sarcoma		Carcinoma	Sarcoma
Cytokeratin (AE1/AE3)	3+	-	-	3+	-
Epithelial membrane antigen	1+	-	-	1+	-
E-cadherin	3+	-	-	-	-
Alpha-fetoprotein	+/-	-	-	+/-	-
c-kit (CD117)	-	1+	3+ (90%-100%)	-	-
CD34	-	2+	3+ (70%)	-	-
Smooth muscle actin	-	2+	1+ (20%-30%)	-	2+
Desmin	-	2+	1+ (2%-4%)	-	2+
S100	-	-	-	-	-
Vimentin	-	3+	-	-	3+

CS: Carcinosarcoma; GIST: Gastrointestinal stromal tumor. 3+: Positive in all tumor cells; 2+: Positive in most tumor cells; 1+: Positive in some tumor cells; +/-: Positive in a few tumor cells.