Classification of segmental XXXX on the face: clues for prognosis.

@entity1 @entity75 @entity1694 @entity6128 @entity74
BACKGROUND: The origin of the distribution of segmental @entity1694 (SV) has not yet been clearly elucidated. Segmental configurations of @entity74 have been explained using two main interpretations, i.e. following either @entity6128 . However, facial SV does not always correspond to either of these distributions. OBJECTIVES: We classified facial SV into several distinctive subtypes according to specific distributions based on long-term observations. METHODS: In total, 257 @entity1 with facial SV were included, all of whom were closely observed for more than 1 year. The distribution patterns of facial SV were classified according to morphological similarities based on clinical observations. RESULTS: The lesions of facial SV were categorized into six subtypes: types I-a and I-b, and types II-V. Type I-a and type IV broadly involved the mid-level face from the forehead to the lower cheek, but type IV lesions selectively appeared on the right side of the face and did not cross the midline. Type I-b lesions chiefly involved the forehead and scalp hair. Types II and III involved the lower face and, frequently, the neck area, and @entity75 were distributed mostly around the right orbital area. The most frequent type of lesion in this study was type I-a (28  8%), followed by types II (16  0%), III (14  4%), IV (10  9%), I-b (10  5%) and V (8  6%). CONCLUSIONS: Newly established patterns of facial SV may be valuable for certain aspects of prognosis, such as the likely degree and @entity75 spreading.
