title: Lupus erythematosus cell preparation-antinuclear factor incongruity. A review of diagnostic tests for systemic lupus erythematosus.
abstract: The cases of 20 patients, each of whom has a positive lupus erythematosus cell preparation and a negative antinuclear factor test, are presented. The concept of a false-positive lupus erythematosus preparation is suggested. Five common mechanisms causing a false-negative antinuclear factor test are discussed and evaluated. Clinical material from the 20 patients is described and pitfalls in diagnosing systemic lupus erythematosus are reviewed.
mesh_terms: D000974:Antibodies, Antinuclear / Q000032:analysis*; D005188:False Negative Reactions; D006098:Granulocytes / Q000276:immunology; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000175:diagnosis* / Q000276:immunology; D009504:Neutrophils
chemical_list: D000974:Antibodies, Antinuclear