eMedicine Specialties > Dermatology > Diseases of the Dermis
Lichen Myxedematosus: Differential Diagnoses & Workup
Updated: Jan 14, 2009
- Overview
- Differential Diagnoses & Workup
- Treatment & Medication
- Follow-up
- Multimedia
Differential Diagnoses
| Amyloidosis, Nodular Localized Cutaneous | Porphyria Cutanea Tarda |
| Colloid Milium | Sarcoidosis |
| Granuloma Annulare | Scleredema |
| Leprosy | Xanthomas |
| Morphea |
Other Problems to Be Considered
- Nephrogenic systemic fibrosis
- Progressive systemic sclerosis
- Leonine facies: The differential diagnosis of this condition includes mycosis fungoides, mastocytosis, amyloid, lepromatous leprosy, lichen myxedematosus, actinic reticuloid, leishmaniasis, lipoid proteinosis, and progressive nodular histiocytosis.
Workup
Laboratory Studies
- Serum protein immunoelectrophoresis generally reveals the presence of a serum paraprotein (usually 7S-IgG) with lambda light chains.
- Few patients may have myeloma or Waldenström macroglobulinemia.
- Thyroid function test results are normal.
- Findings of other laboratory test are usually normal.
Imaging Studies
- Chest radiographic findings are usually normal in healthy patients.
Other Tests
- In patients with systemic symptoms such as dysphagia, dyspnea, or neurologic symptoms, the specific systems affected should be evaluated.
Histologic Findings
Lesions have large depositions of mucin in the dermis. Numerous plump stellate fibroblasts develop throughout the dermis. The mucin stains with periodic acid-Schiff and Alcian blue at pH 2.5 but not pH 0.4, and it metachromatically stains with toluidine blue at pH 3.0. The mucin has been identified as hyaluronic acid, a nonsulfated acid mucopolysaccharide.2
More on Lichen Myxedematosus |
| Overview: Lichen Myxedematosus |
Differential Diagnoses & Workup: Lichen Myxedematosus |
| Treatment & Medication: Lichen Myxedematosus |
| Follow-up: Lichen Myxedematosus |
| Multimedia: Lichen Myxedematosus |
| References |
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References
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Yaron M, Yaron I, Yust I, Brenner S. Lichen myxedematosus (scleromyxedema) serum stimulates hyaluronic acid and prostaglandin E production by human fibroblasts. J Rheumatol. Feb 1985;12(1):171-5. [Medline].
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Kovary PM, Vakilzadeh F, Macher E, Zaun H, Merk H, Goerz G. Monoclonal gammopathy in scleredema. Observations in three cases. Arch Dermatol. Sep 1981;117(9):536-9. [Medline].
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Picascia DD, Magid ML, Minkin RB. Pruritic papular eruption. Papular mucinosis (lichen myxedematosus). Arch Dermatol. Jul 1989;125(7):986-7, 990. [Medline].
Rongioletti F. Lichen myxedematosus (papular mucinosis): new concepts and perspectives for an old disease. Semin Cutan Med Surg. Jun 2006;25(2):100-4. [Medline].
Rongioletti F, Rebora A. Updated classification of papular mucinosis, lichen myxedematosus, and scleromyxedema. J Am Acad Dermatol. Feb 2001;44(2):273-81. [Medline].
Truhan AP, Roenigk HH Jr. Lichen myxedematosus. An unusual case with rapid progression and possible internal involvement. Int J Dermatol. Mar 1987;26(2):91-5. [Medline].
Wright RC, Franco RS, Denton D, Blaney DJ. Scleromyxedema. Arch Dermatol. Jan 1976;112(1):63-6. [Medline].
Further Reading
Keywords
papular mucinosis, scleromyxedema, myxedematosus, plasma cell dyscrasia
Differential Diagnoses & Workup: Lichen Myxedematosus