A Medical Manipulator System with Lasers in Photodynamic Therapy of Port Wine Stains

Table 2

The statistical results of traditional and MMS assisted PDT treatment of PWS.

Grades	Traditional PDT treatment of PWS		MMS assisted PDT treatment of PWS
	Number of lesions	Percentage (%)	Number of lesions	Percentage (%)
I	128	6.6	15	5.1
II	746	38.3	124	41.9
III	923	47.4	145	49.0
IV	145	7.4	11	3.7
V	7	0.3	1	0.3
Total of lesions	1949		296