title: Therapy-related myelodysplastic syndrome with der(17)t(12;17)(q13;p13) as a new recurrent cytogenetic abnormality after treatment for chronic lymphocytic leukemia.
abstract: A 54-year-old male presented to our hospital for evaluation of peripheral lymphocytosis. He was initially diagnosed with chronic lymphocytic leukemia (CLL) and treated with six cycles of fludarabine, cyclophosphamide, and rituximab chemotherapy. Therapy-related myelodysplastic syndrome (t-MDS) was suspected approximately 2 years later; in addition, complex karyotypic abnormalities including 5q deletion, monosomy 7, and der(17)t(12;17)(q13;p13) were found repeatedly in the patient's chromosome studies. The chromosomal abnormality der(17)t(12;17)(q13;p13) is very rare in hematologic malignancies, and has been reported in only two patients with therapy-related acute myeloid leukemia (t-AML). To our knowledge, this is the first report of t-MDS with der(17)t(12;17)(q13;p13) after treatment for CLL. In addition, we suggest that der(17)t(12;17)(q13;p13) should be considered a new recurrent, nonrandom chromosomal abnormality in patients with t-MDS/AML.
authors.affiliation: Department of Laboratory Medicine, Yonsei University College of Medicine, 250 Seongsanno, Seodaemun-gu, Seoul 120-752, Republic of Korea.
authors.forename: Tae Sung
authors.initials: TS
authors.lastname: Park
authors.forename: June-Won
authors.initials: JW
authors.lastname: Cheong
authors.forename: Jaewoo
authors.initials: J
authors.lastname: Song
authors.forename: Jong Rak
authors.initials: JR
authors.lastname: Choi
mesh_terms: D000971:Antineoplastic Combined Chemotherapy Protocols / Q000009:adverse effects* / Q000627:therapeutic use; D002872:Chromosome Deletion; D002881:Chromosomes, Human, Pair 12 / Q000235:genetics*; D002886:Chromosomes, Human, Pair 17 / Q000235:genetics*; D020732:Cytogenetic Analysis; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000188:drug therapy* / Q000235:genetics / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009006:Monosomy; D009190:Myelodysplastic Syndromes / Q000139:chemically induced* / Q000235:genetics*; D014178:Translocation, Genetic / Q000235:genetics*