Effects and possible anti-tumor immunity of electrochemotherapy with bleomycin on human colon cancer xenografts in nude mice

Table 1 Mean tumor volume and tumor weight before and after treatment.

Group	Mean tumor volume		Tumor volume variance (mm3)	Tumor weight aftertreatment (mg)
	Before (mm3)	After (mm3)
B+E+	37.92±5.39	19.28±8.831	-18.65±7.681	14.48±6.651
B+E-	38.84±5.47	46.93±13.23	8.09±12.53	35.31±10.01
B-E+	37.79±5.45	48.15±8.19	10.36±4.41	36.08±6.25
B-E-	39.32±6.30	53.20±7.22	13.88±2.44	39.99±5.41
F value	F = 0.17	F = 25.22	F = 36.80	F = 25.32
P value	P = 0.917	P<0.01	P<0.01	P<0.01

¹B-E-, no treatment; B+E-, administration of bleomycin alone; B-E+, administration of electric pulses alone; B+E+, ECT.