ウツギサワ　タイジユ   UTSUGISAWA Taijiyu   槍澤　大樹    所属   医学部 医学科（東京女子医科大学病院）    職種   准教授
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Clonal evolution of blasts in an elderly patient with CD56(+) relapsed acute promyelocytic leukemia.
掲載誌名	正式名：American journal of hematology 略　 称：Am J Hematol ISSNコード：03618609/03618609
掲載区分	国外
巻・号・頁	69(1),pp.59-63
著者・共著者	Itoh Shigeki, Sugawara Takeshi, Enomoto Sanae, Ono Yoko, Numaoka Hideharu, Utsugisawa Taiju, Murai Kazunori, Ishida Yoji, Kuriya Shin-ichiro
発行年月	2002/01
概要	We describe an elderly patient with acute promyelocytic leukemia (APL), whose leukemic cells expressed CD56 antigen at relapse but not at diagnosis. Chromosome analysis revealed that blasts with t(8;15;17)(q24.1;q22;q11.2) increased from 4 of 20 cells (20%) at first relapse to 10 of 14 cells (71.4%) at second relapse. In addition, the positivity for CD56 expression on blasts judged by flow cytometric analysis using CD45 blast gating was also increased from 14.2% at first relapse to 75% at second relapse. Although conventional chemotherapy was performed for the initial disease and the first relapse, relapse developed again. Therefore, three courses of intensive postremission chemotherapy including concurrent administration of recombinant human granulocyte colony-stimulating factor (rhG-CSF) with cytarabine were performed after achievement of complete remission (CR) by the treatment with all-trans-retinoic acid (ATRA). Although PML-RARalpha mRNA was not detectable by reverse transcription polymerase chain reaction (RT-PCR), a third relapse occurred. This case demonstrated clonal evolution from a CD56(-) to a CD56(+) blast population and provided further support for the suggestion that CD56 expression might be an unfavorable prognostic factor in t(15;17) APL.
DOI	10.1002/ajh.10005
PMID	11835333