Clinical characteristics of patients with acquired partial lipodystrophy: a multicenter retrospective study.

BSS has a childhood onset and is often associated with autoimmune diseases. Skinfold thickness measurements and fat assessment by DEXA are useful tools to identify the disease. C3 hypocomplementemia and the presence of autoantibodies may be used as additional diagnostic supportive criteria but prevalence of C3 hypocomplementemia may be lower than previously reported.