“…The directed migration of cells along a chemical gradient is termed chemotaxis. The activation of this process appears to be an important mechanism by which immune effector cells settle at sites of inflammation [1], The chemotactic activity of PMNs from peripheral blood was found to be normal in patients with systemic lupus erythematosus [2,3], normal or reduced in patients with rheumatoid arthritis [3][4][5][6], but increased or normal in patients with ankylosing spondylitis, and reactive arthri tis [7][8][9], and in healthy persons with HLA-B27 [7,9], Increased PMN chemotaxis may also occur in patients wdth psoriasis vulgaris [10][11][12], pustular psoriasis [12], pustulosis palmoplantaris (PPP) [13] and severe or sys temic acne [14], The presence of arthropathy does not seem to be associated with en hanced chemotactic activity of PMNs in pa tients with psoriasis vulgaris or pustular psoriasis [11,12]. Investigations on the in fluence of arthropathy in patients with PPP [15,16] and acne [17] have not been per formed.…”