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Xanthogranuloma Necrobiotic xanthogranuloma 1. Surface domed 1. Surface flat 2. Infiltrate often well circumscribed 2. Infiltrate poorly circumscribed 3. Infiltrate often embraced partially by collarettes of epithelium 3. No collarettes of epithelium 4. Infiltrate dense and diffuse 4. Infiltrate patchy 5. Infiltrate usually spares subcutaneous fat; sometimes extends just into the panniculus adiposus 5. Infiltrate […]