Tanino developed a classification for the nevus of Ota based on the anatomic distribution of the dermal melanocyte distribution.
Patient selection: nevus of Ota
Parameters:
(1) unilateral vs bilateral
(2) anatomic involvement
|
Unilateral vs Bilateral
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Anatomic Involvement
|
Type
|
|
unilateral
|
mild orbital type
|
IA
|
|
unilateral
|
mild zygomatic type
|
IB
|
|
unilateral
|
mild forehead type
|
IC
|
|
unilateral
|
ala nasi
|
ID
|
|
unilateral
|
eyelids, periocular, zygomatic, cheek and temple
|
II
|
|
unilateral
|
scalp, forehead, eyebrows, nose (extensive)
|
III
|
|
bilateral
|
NA
|
IV
|
• The orbital type includes: upper and lower eyelids, periorbital and temple regions.
• The zygomatic type includes: infrapalpebral fold, nasolabial fold, and zygomatic regions.
• Involvement of scalp alone would be an unusual pattern.
