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We describe a 77 year old man who developed pure red cell aplasia while receiving antituberculous therapy including isoniazid. Prompt recovery occurred following cessation of isoniazid. In this paper we also review previously described case reports of isoniazid-induced pure red cell aplasia.

6. Peschle C, Marmont AM, Marone G, Genovesi A, Sasso G, Condorelli M: Pure red cell aplasia: Studies on an IgG serum inhibitor neutralizing erythropoietin. Br I Haematol 30:405, 1975 7. Krantz SB: Studies on red cell aplasia. III. Treatment with horse antihuman thymocyte gamma globulin. Blood 39:347, 1972 8. Marmont AM, Peschle C, Sanguineti M, Condorelli M: Pure red cell aplasia (PRCA): Respo...

The pathogenesis of diphenylhydantoin-induced pure red cell aplasia was investigated in the case of a 32-year-old man who developed pure red cell aplasia while he was under treatment with diphenylhydantoin. The patient’s serum lgG purified from serum drawn at the time of diagnosis suppressed normal allogeneic marrow colonyforming (CFU-E) and burst-forming (BFU-E) and autologous blood BFU-E grow...