Inflammatory infiltrate is deep and
Inflammatory infiltrate is limited to
Focal parakeratosis may be present
Parakeratosis is not a feature
■ Large, atypical lymphocytes within the dermal infiltrate are CD30+ (Ki-1), CD3+, and CD15-.
■ All CD30+ cells are anaplastic lymphoma kinase (ALK)-negative.
■ Lymphomatoid papulosis is a lymphoproliferative disorder representing a clonal expansion of CD30+ T cells with a common rearrangement in the T-cell receptor(TcR) gene
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