Abstract
The purpose was to evaluate the frequency of breast cancer (BC) in patients with either systemic (SLE) or incomplete lupus erythematosus (ILE), and possibly to find out immunological differences in patients with and without cancer. 133 consecutive female patients with lupus were included. The records were retrospectively analysed with respect to both malignant disease and routine laboratory parameters (e.g. autoantibodies, white blood cell counts). BC was the most common malignancy that was detected in 50% of female lupus patients with concomitant oncological disease. Other malignancies were significantly less ( p < 0.001) frequent. Only ILE-patients had BC or other oncological diseases. The proportion of ILE-patients with SSA- and SSB-autoantibodies was significantly higher ( p < 1.5 × 10 −10 and 9.1 × 10 −17) in those with malignancies than without. The presented data suggest that BC is the most common malignancy in patients with ILE. SLE is no prerequisite to acquire an oncological disease. Immunological disturbances (e.g. SSA- and SSB-autoantibodies) could play a role in the oncogensis.
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