Volume 60, Issue 1 pp. 110-115
Research Article

Differential effects of radiotherapy on growth and endocrine function among acute leukemia survivors: A childhood cancer survivor study report

Eric J. Chow MD, MPH

Corresponding Author

Eric J. Chow MD, MPH

Department of Pediatrics, Seattle Children's Hospital and University of Washington, Seattle, Washington

Division of Clinical Research, Fred Hutchinson Cancer Research Center, Seattle, Washington

Fred Hutchinson Cancer Research Center, PO Box 19024, Mailstop M4-C308, Seattle, WA 98109-1024.===Search for more papers by this author
Wei Liu PhD

Wei Liu PhD

Department of Biostatistics, St. Jude Children's Research Hospital, Memphis, Tennessee

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Kumar Srivastava PhD

Kumar Srivastava PhD

Department of Biostatistics, St. Jude Children's Research Hospital, Memphis, Tennessee

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Wendy M. Leisenring ScD

Wendy M. Leisenring ScD

Division of Clinical Research, Fred Hutchinson Cancer Research Center, Seattle, Washington

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Robert J. Hayashi MD

Robert J. Hayashi MD

Department of Pediatric Hematology/Oncology, Washington University School of Medicine, St. Louis, Missouri

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Charles A. Sklar MD

Charles A. Sklar MD

Department of Pediatrics, Memorial Sloan-Kettering Cancer Center, New York

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Marilyn Stovall PhD

Marilyn Stovall PhD

Department of Radiation Physics, University of Texas M.D. Anderson Cancer Center, Houston, Texas

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Leslie L. Robison PhD

Leslie L. Robison PhD

Department of Epidemiology and Cancer Control, St. Jude Children's Research Hospital, Memphis, Tennessee

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K. Scott Baker MD, MS

K. Scott Baker MD, MS

Department of Pediatrics, Seattle Children's Hospital and University of Washington, Seattle, Washington

Division of Clinical Research, Fred Hutchinson Cancer Research Center, Seattle, Washington

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First published: 24 May 2012
Citations: 56

Conflict of interest: Nothing to declare.

Abstract

Background

The differential effects of cranial radiotherapy (CRT), spinal radiotherapy (SRT), and total body irradiation (TBI) on growth and endocrine outcomes have rarely been examined in combination among childhood acute leukemia survivors.

Procedure

Self-reported height/weight, hypothyroidism, and pregnancy/live birth were determined among acute lymphoblastic and myeloid leukemia survivors (n = 3,467) participating in the Childhood Cancer Survivor Study, an ongoing cohort study of 5-year survivors of pediatric cancers diagnosed from 1970 to 1986.

Results

Compared with no radiotherapy, risk estimates were consistent across outcomes (adult short stature, hypothyroidism, absence of pregnancy/live birth) with CRT treatment associated with 2–3-fold increased risks, TBI associated with 5–10 fold increased risks, and CRT + TBI associated with >10 fold increased risks. Exposure to any SRT further increased risk of these outcomes 2–3-fold. Changes in body composition were more nuanced as CRT only was associated with an increased risk of being overweight/obese (OR 1.6, 95% CI 1.3–1.9) whereas TBI only was associated with an increased risk of being underweight (OR 6.0, 95% CI 2.4–14.9).

Conclusions

Although patients treated with CRT + TBI were at greatest risk for short stature, hypothyroidism, and a reduced likelihood of pregnancy/live birth, those treated with either modality alone had significantly increased risks as well, including altered body composition. Any SRT exposure further increased risk in an independent fashion. Pediatr Blood Cancer 2013; 60: 110–115. © 2012 Wiley Periodicals, Inc.

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