Indolent CD8-positive lymphoid proliferation of the ear - A distinct primary cutaneous T-cell lymphoma?
Fiche publication
Date publication
décembre 2007
Auteurs
Membres identifiés du Cancéropôle Est :
Dr CORNILLET-LEFEBVRE Pascale
Tous les auteurs :
Petrella T, Maubec E, Cornillet-Lefebvre P, Willemze R, Pluot M, Durlach A, Marinho E, Benhamou JL, Jansen P, Robson A, Grange F
Lien Pubmed
Résumé
The authors report 4 cases of cutaneous lymphoproliferation unusual by their histology and their clinical presentation. Each presented with a history of a slow growing nodule on the ear. Despite the indolent clinical evolution, the histology suggested a high-grade lymphoma. All lesions consisted of a dense, diffuse proliferation of monomorphous medium-sized T cells throughout the dermis and subcutis. There was no epidermotropism and a grenz zone was clearly present in each case. The tumor cells displayed irregular blastlike nuclei, with small micleoli and clear chromatin and had a CD3(+), CD8(+), CD4(-), TIA1(+), granzyme B- immunophenotype with a loss of other T-cell antigens. The 3 cases with available material for polymerase chain reaction studies displayed a monoclonal T-cell rearrangement of the T-cell receptor-gamma chain. These cases do not correspond to a recognized cutaneous T-cell lymphoma as described in the recent WHO/EORTC classification. The apparent striking propensity for the ear suggests that they might represent a specific entity. Further cases are needed to confirm this hypothesis. It is important for such indolent lesions to be known to avoid over treatment.
Référence
Am J Surg Pathol. 2007 Dec;31(12):1887-92.