The distribution of port wine stains over the face depends on the embryonic vascular configuration.
Patient selection: neonate with facial port wine stains
There are 3 embryonic vascular configurations - S1, S2 and S2.
Anatomic deliminators:
(1) horizonal line through both left and right inner and outer canthi
(2) horizontal line through the corners of the mouth
|
Segment
|
Description
|
|
S1
|
forehead and supraorbital regions, upper eyelids, entire nose and philtrum
|
|
S2
|
maxillary and zygomatic regions below the eyes, including lower eyelid
|
|
S3
|
mandibular
|
Segments:
(1) left S1
(2) left S2
(3) left S3
(4) right S1
(5) right S2
(6) right S3
|
Involvement of Segment
|
Score
|
|
0%
|
0
|
|
1 to 25%
|
1
|
|
26 to 50%
|
2
|
|
51 to 75%
|
3
|
|
76 to 100%
|
4
|
total score for the left side of the face =
= SUM(points for the left side segments)
total score for the right side of the face =
= SUM(points for the right side segments)
Interpretation:
• minimum score for each side: 0
• maximum score for each side: 12
• minimum score for entire face: 0
• maximum score for entire face: 24
