Table 1. Frequency of positive expression of PSC markers using cut-off scores derived from the area under the ROC curve.

PSC markers	Area under ROC	Cut-off score	Positive expression n (%)
CD44	0.501	5	82 (77)
Musashi-1	0.568	150	87 (85)
CD133	0.523	50	45 (44)

Abbreviations: PSC=putative stem cell; ROC=receiver-operating characteristic.