Table 1.

Frequency of phenotypic distribution of facial port-wine stain (PWS) using the traditional trigeminal nerve classification, with which no clear associations were found with SWS, in 171 patients

Trigeminal nerve distribution of PWS	Patients, n (%)
V1 alone	25 (14·6)
V2 alone	21 (12·3)
V3 alone	9 (5·3)
V1 and V2	63 (36·8)
V1 and V3	2 (1·2)
V2 and V3	10 (5·8)
V1, V2 and V3	41 (24·0)