Key Points
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Colloid milium is a rare, degenerative skin condition characterized by deposition of amorphous hyaline-like material in the dermis.
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Colloid milium and colloid degeneration include at least four distinct clinicopathological conditions: classic adult-type colloid milium, juvenile colloid milium, nodular Âcolloid degeneration (paracolloid), and pigmented colloid milium (hydroquinone related).
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There are usually no systemic implications, with the exception of a rare ligneous conjunctivitis or periodontitis in the juvenile type.
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Special stains, immunohistochemical studies, and electron microscopy have allowed the distinction from similar conditions such as amyloidosis.
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Rongioletti, F. (2010). Colloid Milium. In: Smoller, B., Rongioletti, F. (eds) Clinical and Pathological Aspects of Skin Diseases in Endocrine, Metabolic, Nutritional and Deposition Disease. Springer, New York, NY. https://doi.org/10.1007/978-1-60761-181-3_20
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