SBE presenting with type III cryoglobulinaemia.

A case of subacute bacterial endocarditis which presented with cryoglobulinaemia is reported. A secondary cause of cryoglobulinaemia was suggested following characterization, which revealed a Type III (mixed polyclonal) cryoprotein. Levels of cryoglobulin were high and remained so until the source of infection was eradicated, and the cause of the cryoglobulinaemia is briefly discussed.