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Australas J Dermatol ; 56(4): e83-7, 2015 Nov.
Article in English | MEDLINE | ID: mdl-25330922

ABSTRACT

Primary cutaneous large cell anaplastic lymphoma (C-ALCL) and lymphomatoid papulosis (LyP) are cutaneous CD30+ lymphoproliferative disorders (CD30+ LPD). An association with CD30+ LPD and pseudoepitheliomatous hyperplasia has been recognized. Additionally, rare reports of epithelial neoplasms such as keratoacanthomas and squamous cell carcinomas (SCC) occurring in association with both C-ALCL and LyP have been reported. We report two cases of CD30+ LPD with associated epithelial neoplasms; one patient with a primary cutaneous CD30+ LPD and SCC identified within the same lesion, and the other with a keratoacanthoma arising in a lesion of LyP. The pathogenesis of this association is poorly understood although various hypotheses exist. Awareness of the coexistence of these entities will avoid misdiagnosis and incorrect treatment.


Subject(s)
Carcinoma, Squamous Cell/pathology , Keratoacanthoma/pathology , Lymphomatoid Papulosis/pathology , Neoplasms, Multiple Primary/pathology , Skin Neoplasms/pathology , Adult , Humans , Keratoacanthoma/complications , Lymphomatoid Papulosis/complications , Male , Skin Neoplasms/complications
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