Table 1. MCC Cases Tested for MCV T antigen Expression.

Case #	Age	Sex	Site	IHC									Treatment	Outcome
				CD56	CK20	Chromogranin	CK7	Synaptophysin	Others	MCVLT (CM2B4)	MCVLT (Ab3)	MCVLT (PCR)
1	59	M	Groin	+	+	+	–	–	HMWCK-	–	–	+	NK	Metastais (LN)
2	37	M	Thigh	+	+	+		+	c-KIT+, MIC2-	+	+	+	Rx, Rx-R0 resection	NK
3*	37	F	Wrist		+	+	–		MIB1-100-	–	–	+	Excision, R0 resection	FOD(21mo)
4	67	M	AxillaLN		+	+	–	+	CK+, EMA+, AE1A3+	+	+	+	Excision, CT(Etoposide, Carboplatin)	FOD(16mo)
5	74	M	Leg		+	+			CK-	–	–	+	NK	NK
6	60	F	Scalp	+	+	+	–	+	CK+,NSE + EMA+,MIB1-80-	–	–	NT	NK	NK
7	57	F	Nose		+	+			EMA+,CK-	+	+	NT	Excision	NK
8	64	M	Knee			+		+	EMA+, CK+,S100P-	–	–	NT	Excision	NK
9	72	M	Neck			+		+	AE1/AE3+,c-KIT+	–	–	+	Excision	NK
10	59	M	Thumb		+	+	–	+	c-KIT+	–	NT	NT	Amputation & CT (Paclitaxel, Carboplatin, Etoposide, Imatinib)	Metastasis (Scalp)
11	66	M	Thigh	+	+	+	–	+	HMB45-,S100P-,AE1/AE3+	–	–	+	Supportive Care	Metastasis (LN & Lung)
12	74	F	Knee	+		+			S100P-, GFAP-,AE1/AE3+, EMA-,BCl2+	–	+	–	NK	NK
13	62	F	Arm		+				AE1/AE3+, MIC-2+, Desmin-,Tdt-	–	+	+	NK	NK
14	62	F	Thigh		+	+		+	MIC2+, AE1/AE3+, Desmin-, MyoD1-, Myogenin-	–	–	–	NK	NK
15	60	F	Neck (Submadibular)		+	+	+	+	EMA+	–	–	NT	NK	NK
16	50	M	Chest wall		+	–		+	AE1/AE3+, MIC2+, Fli1+,Desmin-	–	–	–	NK	NK
17	42	M	Upper Arm		+	+		+	AE1/AE3+, MIC2+, Fli1+,Desmin-, S100P-	+	+	–	NK	NK
18	49	M	Inguinal and Gluteal		+			+	MIC2+,Desmin-	+	NT	NT	CT	Metastais (LN)

Abbreviations: F-female, M-Male,+ -positive, − -negative,NT-Not tested, HMWCK-High molecular weight cytokeratin, EMA-Epithelial membrane antigen, CK- Cytokeratin, AE1/AE3- Pan- Cytokeratin, NSE- Neuron specific enolase, MIB1-Mind Bomb1, S100P–S100 calcium-binding protein P, HMB45-Human melanoma Black, GFAP-Glial fibrillary acid protein, MIC2-Cluster of differentiation 99 (CD99), Tdt-Terminal deoxynucleotidyl transferase, Fli1- Friend Leukemia Integration, * -MCC with coexisting Bowen disease., NK-not known, CT-chemotherapy, FOD-free-of-disease, LN-Lymph Node.