期刊
DERMATOLOGY
卷 223, 期 1, 页码 13-19出版社
KARGER
DOI: 10.1159/000330335
关键词
Ataxia telangiectasia; Cutaneous granulomas; Immunodeficiency; B cells; T cells; Natural killer cells
类别
Background: Non-infective cutaneous granulomas with unknown pathogenesis occur in various primary immunodeficiencies (PIDs) including ataxia telangiectasia (A-T). Objective: To find a common immunological denominator in these cutaneous granulomas. Methods: The dermatological and immunological features of 4 patients with A-T and cutaneous granulomas were described. The literature on skin granulomas in A-T and in other PIDs is reviewed. Results: All 4 A-T patients had progressive granulomas on their limbs and showed decreased IgG and IgA concentrations with normal IgM levels. They had a marked decrease in B cells and naive T cells coinciding with the appearance of the cutaneous granulomas. Similar B-and T-cell abnormalities were described in patients with other PIDs with skin granulomas. Conclusions: We hypothesize that the pathogenesis of these skin granulomas is related to immune dysregulation of macrophages due to the absence of naive T cells with an appropriate T-cell receptor repertoire and the unopposed activity of gamma delta T cells and/or natural killer cells. Copyright (C) 2011 S. Karger AG, Basel
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