Increased frequency of HLA-A1 in calcifying tendinitis? In a study wit
h 46 patients Sengar et al. observed an association of calcifying tend
initis and HLA-A1 in 50% (normal regional frequency: 26,7%). In our st
udy with 55 patients we found a presence of HLA-A1 in only 32,7% (norm
al regional frequency: 30,5%), there was no increased frequency.