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Case Reports
Journal Article
Acute erythroderma as an exclusion criterion for idiopathic CD4+ T lymphocytopenia.
Archives of Dermatology 1994 December
BACKGROUND: Idiopathic CD4+ T lymphocytopenia is defined as a CD4+ T lymphocytopenia of less than 0.3 x 10(9)/L that is not associated with human immunodeficiency virus, other immunodeficiency, or immunosuppressive therapy. The associated clinical course and laboratory findings are variable. We describe a subset of patients whose peripheral CD4+ T-lymphocytopenia was transient, and suggest a pathomechanism for this phenomenon.
OBSERVATIONS: We describe three patients with cutaneous T-cell lymphoma, atopic dermatitis, or psoriasis in whom acute erythroderma was concomitant with a peripheral CD4+ T lymphocytopenia that normalized after resolution of the erythroderma. Immunoperoxidase staining of skin biopsy specimens and quantitative estimation of CD4+ T lymphocytes in the cutaneous and peripheral blood compartments demonstrated that the peripheral CD4+ T lymphocytopenia in these cases most probably resulted from sequestration of CD4+ T lymphocytes in the skin. The skin of an erythrodermic patient appears capable of sequestering 10(10) to 10(11) CD4+ T lymphocytes, whereas the peripheral blood compartment contains in the range of 10(9) CD4+ T lymphocytes.
CONCLUSIONS: We propose that CD4+ T lymphocytopenia can occur as a result of acute erythroderma of multiple causes and that acute erythroderma associated with transient CD4+ T lymphocytopenia be considered as an exclusion criterion for idiopathic peripheral blood CD4+ T lymphocytopenia.
OBSERVATIONS: We describe three patients with cutaneous T-cell lymphoma, atopic dermatitis, or psoriasis in whom acute erythroderma was concomitant with a peripheral CD4+ T lymphocytopenia that normalized after resolution of the erythroderma. Immunoperoxidase staining of skin biopsy specimens and quantitative estimation of CD4+ T lymphocytes in the cutaneous and peripheral blood compartments demonstrated that the peripheral CD4+ T lymphocytopenia in these cases most probably resulted from sequestration of CD4+ T lymphocytes in the skin. The skin of an erythrodermic patient appears capable of sequestering 10(10) to 10(11) CD4+ T lymphocytes, whereas the peripheral blood compartment contains in the range of 10(9) CD4+ T lymphocytes.
CONCLUSIONS: We propose that CD4+ T lymphocytopenia can occur as a result of acute erythroderma of multiple causes and that acute erythroderma associated with transient CD4+ T lymphocytopenia be considered as an exclusion criterion for idiopathic peripheral blood CD4+ T lymphocytopenia.
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