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What is Which of the following is not a ceruloderma? and explain in detail?
Ceruloderma refers to dermal melanocytic lesions with blue colour. These include mongolian spot, N. of Ota & Ito, blue nevus. NB: Mongolian spot- lumbosacral region is the common site. Nevus of Ota- 1st & 2nd division of trigeminal nerve Nevus of Ito- acromioclavicular region & deltoid. Cockade nevus is an acquired melanocytic nevus refering to multiple, target-like naevi showing concentric circles of increased melanin pigmentation. Ref: Rook's textbook of dermatology, Edition-8, Page-54.20.