title: Cutaneous peripheral T-cell lymphoma associated with a proliferation of B cells.
abstract: Although the new World Health Organization-European Organization for Research and Treatment of Cancer classification focuses on providing uniformity in the diagnosis of cutaneous lymphomas, cutaneous peripheral T-cell lymphoma (PTL) remains a poorly defined subgroup. As follow-up to a study of systemic PTL complicated by a proliferation of B cells, we studied 16 cases of cutaneous PTL that contained morphologically atypical T cells associated with a significant infiltrate of B cells (about 20%-50%). A clonal T-cell receptor gamma chain gene rearrangement was present in all cases. In contrast, a clonal immunoglobulin heavy chain gene rearrangement was present in only 1 case. Clinical staging in 14 cases identified systemic involvement in 2. At last follow-up, both patients with systemic involvement had died of disease, and the majority of patients with primary cutaneous disease were alive (11/12). The presence of numerous atypical B cells and T cells caused diagnostic confusion in these cases. Comprehensive pathologic studies, coupled with clinical staging, are necessary for the accurate diagnosis of this unusual manifestation of cutaneous PTL.
authors.affiliation: Dept of Pathology, Stanford University Medical Center, CA 94305, USA.
authors.forename: Ingerlisa W
authors.initials: IW
authors.lastname: Mattoch
authors.forename: Regan
authors.initials: R
authors.lastname: Fulton
authors.forename: Youn
authors.initials: Y
authors.lastname: Kim
authors.forename: Richard
authors.initials: R
authors.lastname: Hoppe
authors.forename: Roger A
authors.initials: RA
authors.lastname: Warnke
authors.forename: Uma N
authors.initials: UN
authors.lastname: Sundram
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001402:B-Lymphocytes / Q000473:pathology*; D005260:Female; D015334:Gene Rearrangement, gamma-Chain T-Cell Antigen Receptor / Q000235:genetics; D006801:Humans; D007150:Immunohistochemistry; D017403:In Situ Hybridization; D016411:Lymphoma, T-Cell, Peripheral / Q000235:genetics / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D012878:Skin Neoplasms / Q000235:genetics / Q000473:pathology*