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Lymphomatoid papulosis

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Title: Lymphomatoid papulosis  
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Subject: Lymphoma, Cutaneous T cell lymphoma, International Classification of Diseases for Oncology, Parapsoriasis, ICD-10 Chapter XII: Diseases of the skin and subcutaneous tissue
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Lymphomatoid papulosis

Lymphomatoid papulosis
Classification and external resources
ICD-10 ICD-O: 9718/1
DiseasesDB eMedicine MeSH D017731

Lymphomatoid papulosis (LyP) is a rare skin disorder. The overall prevalence rate of lymphomatoid papulosis is estimated at 1.2 to 1.9 cases per 1,000,000 population.

This rare condition has only been studied in depth since 1968.[1]


It can appear very similar to anaplastic large cell lymphoma.[2]

Type "A" is CD30 positive, while type "B" is CD30 negative.[3]

It has been described as "clinically benign but histologically malignant."[4]


It can evolve into lymphoma.[5]


It may respond to methotrexate.[6]

See also


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