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First Published Online January 28, 2009
The Oncologist, Vol. 14, No. 2, 164-173, February 2009; doi:10.1634/theoncologist.2008-0217
© 2009 AlphaMed Press

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Pediatric Oncology

Malignancy in Children with Trisomy 21

Karen R. Rabina, James A. Whitlockb

aBaylor College of Medicine, Houston, Texas, USA; bVanderbilt University Medical Center, Nashville, Tennessee, USA

Key Words. Down syndrome • Acute lymphoblastic leukemia • Acute megakaryoblastic leukemia • Myeloproliferative disorders • GATA1 transcription factor • Janus kinase 2

Correspondence: Karen R. Rabin, M.D., Texas Children's Cancer Center, 6621 Fannin Street, CC1510.00, Houston, Texas 77030, USA. Telephone: 832-822-1523; Fax: 832-825-1503; e-mail: krrabin{at}txccc.org

Received September 30, 3008; accepted for publication December 31, 2008; first published online in THE ONCOLOGIST Express on January 28, 2009.

Disclosures

Karen R. Rabin: None; James A. Whitlock: Consultant/advisory role: ITA Partners; Honoraria: Sanofi-Aventis; Research funding/contracted research: Bristol-Myers Squibb.

Section editors Susan M. Blaney and Ross Pinkerton have disclosed no financial relationships relevant to the content of this article.

The content of this article has been reviewed by independent peer reviewers to ensure that it is balanced, objective, and free from commercial bias.

Target audience: Physicians who wish to advance their current knowledge of clinical cancer medicine in pediatric oncology.

Patients with Down syndrome (DS) display a unique spectrum of malignancies, with a 10- to 20-fold higher risk of acute leukemias, and a markedly lower incidence of solid tumors. This review discusses the current understanding of the basis for this distinctive pattern of cancer incidence and the clinical and biologic features of the malignant disorders most frequent in DS individuals: transient myeloproliferative disease, acute megakaryoblastic leukemia, and acute lymphoblastic leukemia. We also review distinctive pharmacogenetic issues, highlighting the differential chemosensitivity and toxicity profiles of DS patients compared with the general population, and epidemiologic studies of protective and adverse environmental risk factors for the development of leukemia.






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