title: Primary cutaneous CD8+ cytotoxic T-cell lymphoma involving the epidermis and subcutis in a young child.
abstract: CD8+ cytotoxic T-cell lymphoma involving the skin represents a heterogeneous group of diseases that include subcutaneous panniculitis-like T-cell lymphoma, primary cutaneous aggressive epidermotropic CD8+ cytotoxic T-cell lymphoma, and 'type D' lymphomatoid papulosis. In this report, we describe a case of CD8+ cytotoxic T-cell lymphoma involving both the epidermis and subcutis. The patient was a 6-year-old girl who presented with a 3-year history of multiple plaques on her trunk and legs. The lesions had relapsed twice but responded well to prednisone. Histopathologic examination showed the proliferation of atypical lymphocytes in the epidermis, dermis and subcutaneous tissue. On immunohistochemical analysis, the atypical lymphocytes were positive for βF1, CD3, CD8, perforin, granzyme B and TIA-1, but negative for T-cell receptor (TCR) γ, CD4, CD30 and CD56. It was difficult to classify this tumor in terms of the known types of cutaneous lymphoma, and this case should be differentiated with subcutaneous panniculitis-like T-cell lymphoma and primary cutaneous aggressive epidermotropic CD8+ T-cell lymphoma.
authors.affiliation: Department of Dermatology, Xijing Hospital, The Fourth Military Medical University, Xian, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Tianwen
authors.initials: T
authors.lastname: Gao
authors.forename: Gang
authors.initials: G
authors.lastname: Wang
mesh_terms: D018414:CD8-Positive T-Lymphocytes / Q000276:immunology; D002648:Child; D003937:Diagnosis, Differential; D004817:Epidermis / Q000473:pathology; D005260:Female; D005938:Glucocorticoids / Q000627:therapeutic use; D006801:Humans; D016410:Lymphoma, T-Cell, Cutaneous / Q000000981:diagnostic imaging / Q000188:drug therapy / Q000276:immunology / Q000473:pathology*; D011241:Prednisone / Q000627:therapeutic use; D011859:Radiography; D012878:Skin Neoplasms / Q000000981:diagnostic imaging / Q000188:drug therapy / Q000276:immunology / Q000473:pathology*; D040521:Subcutaneous Tissue / Q000276:immunology / Q000473:pathology; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology / Q000473:pathology*
chemical_list: D005938:Glucocorticoids; D011241:Prednisone
keywords: CD8; cutaneous lymphoma; cytotoxic lymphoma; epidermotropism; subcutaneous panniculitis-like T-cell lymphoma