Abstract
Leukocytes from patients with granuloma annulare were studied in vitro in order to detect functional abnormalities. Random migration and chemotaxis of both polymorphonuclear leukocytes and monocytes were similar in patients and controls. Preincubation of normal cells with patients' plasma did not enhance or inhibit locomotion. Phagocytosis and oxidative burst as reflected by chemiluminescence were also normal. Peripheral blood lymphocytes incorporated uridine normally with and without stimulation by the non-specific mitogen phytohaemagglutinin. These studies suggest that peripheral blood leukocyte function in patients with granuloma annulare is normal, but do not exclude a functional abnormality in tissue.
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