Huang et al proposed a new classification of nevus of Ota. The authors are from Peking Union Medical College Hospital (PUMCH).
Patient selection: nevus of Ota
The classification has 5 main types and 15 subdivisions, which makes it somewhat complex.
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Key Feature
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Main Type
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involves one branch of the trigeminal nerve
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I
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involves two branches of the trigeminal nerve
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II
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involves all three branches of the trigeminal nerve
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III
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bilateral
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IV
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accompanied by other cutaneous complications
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V
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where:
• Type V is different from the other 4 categories conceptually.
• In the series of Nam et al about 9% of patients could not be classified by this method.
Subtypes (15):
(1) for Type I (6): Ia1, Ia2, Ib1, Ib2, Ib3, Ic
(2) for Type II (4): IIa1, IIA2, IIa3, IIb
(3) for Type III (2): IIIa, IIIb
(4) for Type IV (2)
(5) for Type V (1)
