Histopathological aspects and differential diagnosis of CD8 positive lymphomatoid papulosis

Autor: Márta, Marschalkó, Nóra, Gyöngyösi, Judit, Noll, Zsuzsanna, Károlyi, Norbert, Wikonkál, Judit, Hársing, Enikő, Kuroli, Judit, Csomor, András, Matolcsy, Kárpáti, Sarolta, Ágota, Szepesi
Rok vydání: 2016
Předmět:
Zdroj: Journal of cutaneous pathology. 43(11)
ISSN: 1600-0560
Popis: Lymphomatoid papulosis (LyP) belongs to CD30+ lymphoproliferative disorders with indolent clinical course. Classic histological subtypes, A, B and C are characterized by the CD4+ phenotype, while CD8+ variants, most commonly classified as type D, were reported in recent years. We present 14 cases of CD8+ LyP. In all patients, self-resolving or treatment-sensitive papules were observed. Of 14 cases 7 produced results with typical microscopic features of LyP type D mimicking primary cutaneous aggressive epidermotropic CD8+ T-cell lymphoma. The infiltration pattern in 4 of 14 cases were consistent with classic LyP type B, without CD30 expression in two cases, resembling mycosis fungoides (MF). The morphology of 2 of 14 cases shared a certain consistency with classic type A and C, lacking eosinophils and neutrophils. Extensive folliculotropism characteristic to type F was observed in 1 of 14 case. Significant MUM1 and PD1 expression were detected in 2 of 14 and 3 of 14 cases, respectively. We concluded that CD8+ LyP may present with different histopathological features compared with type D, similar to CD4+ LyP variants. Differential diagnoses include CD8+ papular MF, folliculotropic MF and anaplastic large cell lymphoma in addition to primary cutaneous aggressive epidermotropic T-cell lymphoma. We emphasise that rare CD8+ LyP cases may exist with CD30-negativity.
Databáze: OpenAIRE
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