The absence of differences in serum MIF according to other clinical parameters in SSc is in line with one previous study,14 but conflicts with other studies which have reported higher serum MIF in patients with diffuse SSc, PAH or digital ulcers.9, 10 The small size of these vascular phenotypic subsets in our study may explain these discrepancies. The gene discussed is MIF; the disease is systemic sclerosis.