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Atypical lichen myxedematosus is an intermediate form of lichen myxedematosus (LM) (a form of mucin dermal deposit) which does not meet the criteria for either scleromyxedema or the localized form. Three clinical subtypes have been described and include scleromyxedema without monoclonal gammopathy; localized forms with monoclonal gammopathy and/or systemic symptoms; localized forms with mixed features of the 5 subtypes of localized LM (discrete form, acral persistent papular mucinosis, self-healing papular mucinosis, papular mucinosis of infancy, and a pure nodular form). The course of atypical LM is unpredictable because only a few cases have been reported.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for atypical lichen myxedematosus.
5 publications have been identified in PubMed for atypical lichen myxedematosus. Research spans Case Report / Case Series (100%).
Marani A (2026). [PMID: 40371822](https://pubmed.ncbi.nlm.nih.gov/40371822/). *Dermatol Reports*. [Case Report / Case Series]
Ghaleb M (2025). [PMID: 41311429](https://pubmed.ncbi.nlm.nih.gov/41311429/). *Oxf Med Case Reports*. [Case Report / Case Series]
Peshin S (2024). [PMID: 39070368](https://pubmed.ncbi.nlm.nih.gov/39070368/). *Cureus*. [Case Report / Case Series]
Bregvadze K (2024). [PMID: 39399580](https://pubmed.ncbi.nlm.nih.gov/39399580/). *SAGE Open Med Case Rep*. [Case Report / Case Series]
Cline E (2024). [PMID: 39628746](https://pubmed.ncbi.nlm.nih.gov/39628746/). *Cureus*. [Case Report / Case Series]
Data assembled from 3 of 12 sources · Last updated Sep 19, 2026, 6:58 PM UTC
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Genetic and Rare Diseases Info Center