Correspondence MDS or AL secondary to chemoradiotherapy for malignancy ( 1 9 patients) or rheumatoid arthritis (one patient). Three patients with end-stage, therapy-resistant disease were excluded from this analysis. Since no patient had therapylinked refractory anaemia (RA) at the time of BMT, only data of patients with AL, refractory anaemia with excess of blasts in transformation (RAEBt) or RAEB were analysed. Six out of the 17 patients with therapy-linked MDS or AL died from transplant-related complications, compared to 1 3 out of 45 patients without previous cytotoxic therapy ( P > 0.5). Also the incidence of GVHD and interstitial pneumonia was not significantly increased. No spontaneous report was made of GVHD restricted to previously exposed areas, but this information was not specifically sought for.The second major issue of Dr Bandini's letter is whether a patient with therapy-linked AL or MDS should be induced into complete remission (CR) prior to BMT or not. Ten out of 20 therapy-linked MDS or AL (AL 3 , KAEBt: 4, RAEB: 3 ) have not received chemotherapy with the option to induce CR. Three patients relapsed, three died from transplantrelated complications, and four are alive without evidence of disease at 7 2 + , 59+, 56' and 1.5+ months after BMT. Only one patient transplanted with overt untreated AL is alive without evidence of leukaemia for more than a year. This patient was transplanted with a hypocellular marrow and she is one of the cases mentioned by Dr Bandini (Marmont & Tura, 1986). Seven patients received a transplant early after initiation of chemotherapy (five AML in CR and two RAEB with therapy-induced hypoplasia). None of these patients relapsed: four are alive without evidence of disease at 6 + , 44+, 50+ and 91 + months after BMT and three patients died from transplant-related complications. Three patients with therapy-resistant AML died from interstitial pneumonitis.The numbers are small, but patients transplanted for overt therapy-linked AL fared less well after BMT compared to patients transplanted in CK, similar to the results observed in the overall population transplanted for MDS or s-AML. More data and more follow-up will be needed to substantiate these observations. At present, data from 119 patients transplanted for MDS or secondary AL have been collected and future analyses will be directed at these issues.