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    GlossaryKeratin-Filled Cysts

    Keratin-filled cysts, also known as epidermoid cysts or sebaceous cysts, are benign growths that occur when keratin, a protein found in hair, skin, and nails, becomes trapped beneath the skin. These cysts can appear on the scalp and may be relevant to hair loss as they can cause localized inflammation or irritation, potentially affecting hair follicles and leading to temporary hair thinning. Key distinguishing characteristics include their round shape, firm texture, and the presence of a central pore or opening, which may occasionally release a foul-smelling, yellowish substance when ruptured.

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