Atraumatic removal of a polyethylene catheter from the superior vena cava.

CHEST, VOL. 57, NO. 4, APRIL 1970 that the platelet count might fall further with iron therapy.11 This was not observed (Fig 1). Thrombocytopenia has apparently not been reported in this situation. In the seven previously reported patients with sideroblastic anemia associated with similar antituberculous drugs, the platelet counts were normal2’3 or not mentioned.1 In these patients, the anemia was less severe and the duration of therapy with the suspect drug shorter than in our patient. Folate deficiency is frequent both in patients with tuberculosis (whether on antituberculous therapy or not)7 and in patients with sideroblastic anemia.12 It is possible that a concomitant folate deficiency contributed to or was responsible for the thrombocytopenia. However, the thrombocytopenia disappeared on PZA withdrawal alone while a hospital diet was continued without folate supplementation.