Isolated HLA-B27 cross reactive group (CREG) associated Achilles tendinitis.

SIR, We read with interest the article by Olivieri et al, which describes a case of isolated HLA-B27 associated Achilles tendinitis.' The authors suggest that Achilles tendinitis may for a long time be the only feature of the HLA-B27 associated disease process. We have recently observed a patient with longstanding HLA-B7 associated bilateral Achilles tendinitis without seronegative spondarthropathy..