Table 3.

Concentrations of 5-ALA and PPIX in the normal and the tumor tissue of selected six cases

No.	Case	Tissues	Fluorescence	Administration time of 5-ALA prior to skin incision (hour)	Tissue
					5-ALA	PPIX
					[umol/g protein]	[nmol/g protein]
1	Case6	Normal	-	0	1.4	1.3
2		Tumor	-		0.6	3.1
3	Case8	Normal	-	7	0.4	12.3
4		Tumor	+		0.4	37.3
5	Case13	Normal	-	9 + 0	0.2	23.5
6		Normal	+		0.3	18.8
7		Tumor	+		0.1	4.1
8	Case14	Normal	-	7	1.1	32.0
9		Normal	+		1.3	54.1
10		Tumor	+		0.5	39.4
11	Case15	Normal	-	7	0.3	6.5
12		Normal	+		0.4	22.3
13		Tumor	-		0.5	22.8
14		Tumor	+		1.2	66.7
15	Case16	Normal	-	7	0.1	2.9
16		Tumor	+		0.6	41.2