Ceruloderma is characterised by-
Correct Answer: Excess melanin in dermis , pigmentation not accentuated under Wood's lamp
Description: Ceruloderma- Due to defect in migration of melanocyte. Melanocyte derived from neural crest and migrate to stratum basale (epidermis) Defect in migration of melanocytes due to which they remain in dermis Eg. Of Ceruloderma - 1. Mongolian spot 2. Nevus of OTA3. Nevus of ITO Clinical features - Dermis- Blue lesion - Don't become dark under wood's lamp . Blue d/t - Tyndall effect/optical effect i.e. paial scattering of light Most of light reflected back is blue in colour.
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