Abstract
2-chlorodeoxyadenosine (2-CdA) is associated with prolonged suppression of CD4 lymphocytes. Cases of tuberculosis or mycobacterium avium intracellulare complex (MAC) infection complicating 2-CdA administration have not been reported despite the low CD4 counts. We report a patient with Hairy Cell Leukaemia (HCL) who developed MAC infection one month following 2-CdA treatment. This patient had been previously treated with prednisone for Sweets Syndrome. It would appear that the combination of 2-CdA and prednisone predisposes patients to MAC infection, and if possible this combination of treatment should be avoided.