This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hypo Pigmentary Disorders, Subject name: Dental
True about vitiligo are all except: 
Select and explain. 
A. Surgical treatment is indicated if medical treatment fails, B. Leucotrichia is associated with good prognosis, C. Autoimmune condition, D. Skin biopsy specimen shows abscence of melanocytes.
B: Leucotrichia is associated with good prognosis
Answer: B: Leucotrichia is associated with good prognosis 
Explanation: VITILIGO -Autoimmune disorder -Skin biopsy specimen shows absence of melanocytes. Poor prognostic factors: Leucotrichia Long standing type Lesions over bony prominences Acrofacial -Surgical treatment is indicated if medical treatment fails and disease is stable for >1 year. - Modalities : Skin grafting Non-cultured autologous melanocytic transfer Cultured autologous melanocytic transfer.