Purine analogues in the management of lymphoproliferative diseases.

Three analogues of the purine 2-deoxyadenosine are available for the treatment of low grade lymphoproliferative disorders: pentostatin, cladribine and fludarabine. They have some common features in their mode of action, but differ both in their detailed pharmacology and the extent to which they have activity against specific lymphoid malignancies. Studies defining the scope of these drugs as single agents are now being followed by plans to exploit their potential synergy with other agents and clinically to define useful combination therapies.