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Immunophenotypic analysis suggests that granuloma faciale is a gamma-interferon-mediated process.
Journal of Cutaneous Pathology 1993 October
Granuloma faciale (GF) is an uncommon inflammatory dermatosis with characteristic clinical and histologic features. Very little is known about its pathogenesis. We used a battery of immunoperoxidase lymphocyte markers to study the population of hematopoietic cells present in a case of GF. The majority of non-myelocytic hematopoietic cells present were T-helper lymphocytes. The cells stained strongly with antibodies against the interleukin-2 receptor and with anti-lymphocyte functional antigen (LFA 1 alpha) antibodies. Overlying keratinocytes did not stain with ICAM-1 or HLA-DR, which may account for the presence of the Grenz zone in granuloma faciale. These findings suggest that a gamma-interferon-mediated process may play some role in the pathogenesis of this disorder.
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