Response to STI571 in chronic myelomonocytic leukemia with platelet derived growth factor beta receptor involvement: a new case report.
Based on its ability to inhibit the tyrosine kinase activity of ABL, as well as the c-kit and the Platelet Derived Growth Factor Receptor tyrosine kinases, the spectrum of diseases that may respond to STI571 is increasing. A recently recognized subgroup of myeloproliferative disorders/myelodysplastic syndromes (MPD/MDS) has a t(5;12)(q33;p13) with the activation of the gene for PDGFBR which encodes a receptor tyrosine kinase. Here, we present the case of a patient, with MPD/MDS, and eosinophilia, carrying a translocation t(5;12)(q33;p13) who achieved a complete remission following treatment with STI571, 400 mg daily. At the time of writing he still remains in complete remission with an excellent performance status. There is clearly a need for further studies of STI 571in MPD/MDS with chromosomal translocations involving PDGFBR to confirm this promising initial result.
Oncologia Medica e Trapianto di Midollo Osseo, Pad. H 5 piano, Policlinico Universitario, Via Consolare Valeria, 98125, Messina, Italia.pitini@ciaoweb.it
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D000368:Aged; D000970:Antineoplastic Agents / Q000627:therapeutic use*; D001549:Benzamides; D004791:Enzyme Inhibitors / Q000627:therapeutic use*; D004802:Eosinophilia / Q000175:diagnosis / Q000188:drug therapy; D006801:Humans; D000068877:Imatinib Mesylate; D015477:Leukemia, Myelomonocytic, Chronic / Q000175:diagnosis / Q000188:drug therapy*; D008297:Male; D009190:Myelodysplastic Syndromes / Q000175:diagnosis / Q000188:drug therapy; D009196:Myeloproliferative Disorders / Q000175:diagnosis / Q000188:drug therapy; D010879:Piperazines / Q000627:therapeutic use*; D011743:Pyrimidines / Q000627:therapeutic use*; D020797:Receptor, Platelet-Derived Growth Factor beta / Q000037:antagonists & inhibitors / Q000235:genetics*; D014178:Translocation, Genetic
D000970:Antineoplastic Agents; D001549:Benzamides; D004791:Enzyme Inhibitors; D010879:Piperazines; D011743:Pyrimidines; D000068877:Imatinib Mesylate; D020797:Receptor, Platelet-Derived Growth Factor beta