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Dental General bafeadb7

All of the following are poor prognostic factors of vitiligo except:

A
Long standing skin lesion
B
Underlying thyroid disease
C
Vitiligo on bony prominence
D
Black hair
High-Yield Explanation
Black hair follicle has melanocyte precursors which is a good prognostic sign. White hair or leucotrichia is a poor prognostic sign.

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