The lesion was a cutaneous horn, or cornu cutaneum, a cohesive, keratotic, protuberant mass arising from the strateum corneum, or “horny layer.” Cutaneous horns are composed of compacted keratin, ...
Why did a 43-year-old man develop a soft, slowly expanding egg-sized lump on his nose? The patient came to the hospital after developing a high fever and nose bleed, and said that the lump had ...
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