Apoptosis and proliferation in subcutaneous panniculitis-like T-cell lymphoma.
ABSTRACT Subcutaneous panniculitis-like T cell lymphoma (SPTCL), designated recently as a distinct clinicopathologic entity in the World Health Organization Classification, is a neoplasm composed of cytotoxic T-cells that preferentially involves subcutaneous adipose tissue. Histologically, SPTCL is characterized by extensive karyorrhectic debris and tumor necrosis suggesting that apoptotic mechanisms are involved in its pathogenesis. We assessed the apoptotic index (AI) and proliferation rate (PR) of 13 cases of SPTCL by TUNEL test and Ki-67 immunostaining, respectively. We also immunohistochemically assessed for expression of BCL-2 (anti-apoptosis), BAX (pro-apoptosis), and P53 and correlated the results with apoptosis and proliferation. We detected a high AI (median 8.1%) in 11 cases of SPTCL, and 12 cases had low BCL-2 and high BAX expression. BCL-2 expression inversely correlated with AI (P <.001) and BAX (P <.001). We found a low PR (cutoff > or = 25%) in eight (61%) cases. There was an inverse correlation between AI and PR (r = -.58, P =.04). Ten cases were assessed for P53; immunostaining results were heterogeneous but P53 expression correlated with large cell cytologic features. Our findings demonstrate that SPTCLs have a high AI that may be explained by differential expression of BCL-2 and BAX in the neoplastic cells.
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Article: Cutaneous T-cell lymphomas.[Show abstract] [Hide abstract]
ABSTRACT: To describe the current state of the knowledge regarding the pathology, clinical presentation, treatment strategies, and nursing management of patients with cutaneous T-cell lymphoma, specifically, mycosis fungoides and the Sezary syndrome. Book chapters, review articles, published research studies, proceedings from professional meetings. Although mycosis fungoides and the Sezary syndrome are rare, epidemiologic studies suggest an increasing incidence. Advances in cellular biology and immunology result in continuously changing diagnostic and treatment strategies aimed at this illness. Oncology nurses need an understanding of the current state of the knowledge of cutaneous T-cell lymphoma to meet the extensive needs of patients confronted with this chronic, progressively devastating malignancy.Seminars in Oncology Nursing 12/1998; 14(4):293-301. DOI:10.1016/S0749-2081(98)80007-7
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ABSTRACT: The concept of subcutaneous T-cell lymphoma defines a reduced group of primary cutaneous lymphomas characterized morphologically by a prominent or exclusive subcutaneous tissue involvement. Subcutaneous panniculitic-like T-cell lymphoma is a rare subtype of primary cutaneous T-cell lymphoma clinically mimicking panniculitis. The clinical course is usually protracted with recurrent cutaneous lesions but rarely with early extracutaneous dissemination. The clinical, histopathologic, immunophenotypic, and evolutive features of this heterogeneous and rare group of primary cutaneous lymphomas are reviewed.Dermatologic Clinics 11/2008; 26(4):529-40, viii. DOI:10.1016/j.det.2008.05.008 · 1.43 Impact Factor
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