Table 1.

Tumor formation ability of sorted pancreatic cancer cells using surface markers (number of tumors formed/number of injections)

Groups	5×105	105	5×104	104	5×103	103	102
Unsorted	6/6	5/6	3/6	1/6	0/6	0/0	0/0
CD44+	0/0	9/10	6/10	3/10	1/6	0/4	0/0
CD44	0/0	2/10	1/10	0/4	0/0	0/0	0/0
P		0.0027	0.0286	0.3297
CD24+	0/0	7/8	4/8	3/8	0/4	0/0	0/0
CD24	0/0	2/8	1/8	0/8	0/0	0/0	0/0
P		0.0203	0.1410	0.1000
CD44+ CD24+	0/0	8/8	7/8	6/8	4/8	2/8	0/4
CD44 CD24	0/0	1/8	1/8	0/8	0/8	0/8	0/0
P		0.0007	0.0051	0.0035	0.0385	0.2333

Compared with results from marker-negative cells.