Secondary malignant neoplasms after Wilms tumor: An international collaborative study

• Published in: International journal of cancer Vol. 127; no. 3; pp. 657 - 666
• Main Authors: Breslow, Norman E., Lange, Jane M., Friedman, Debra L., Green, Daniel M., Hawkins, Mike M., Murphy, Michael F.G., Neglia, Joseph P., Olsen, Jørgen H., Peterson, Susan M., Stiller, Charles A., Robison, Leslie L.
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 01.08.2010; Wiley-Blackwell
• Subjects: Adolescent; Biological and medical sciences; Child; childhood cancer; Cohort Studies; Humans; Incidence; Kidney Neoplasms - complications; Kidneys; Medical sciences; Neoplasms, Second Primary - classification; Neoplasms, Second Primary - complications; Neoplasms, Second Primary - pathology; Nephrology. Urinary tract diseases; secondary malignant neoplasm; Survival Analysis; Tumors; Tumors of the urinary system; Wilms tumor; Wilms Tumor - complications; ISE, Pacific, New Zealand Island Terr., Niue I., Alofi, Sir; North America; Human; Kidney disease; Secondary; Urinary system disease; Cancerology; Wilms tumor; childhood cancer; Malignant tumor; secondary malignant neoplasm; Child; Cancer; International
• ISSN: 0020-7136; 1097-0215; 1097-0215
• DOI: 10.1002/ijc.25067

A combined cohort of 8,884 North American, 2,893 British and 1,574 Nordic subjects with Wilms tumor (WT) diagnosed before 15 years of age during 1960–2004 was established to determine the risk of secondary malignant neoplasms (SMN). After 169,641 person‐years (PY) of observation through 2005, 174 solid tumors (exclusive of basal cell carcinomas) and 28 leukemias were ascertained in 195 subjects. Median survival time after a solid SMN diagnosis 5 years or more from WT was 11 years; it was 10 months for all leukemia. Age‐specific incidence of secondary solid tumors increased from approximately 1 case per 1,000 PY at age 15 to 5 cases per 1,000 PY at age 40. The cumulative incidence of solid tumors at age 40 for subjects who survived free of SMNs to age 15 was 6.7%. Leukemia risk, by contrast, was highest during the first 5 years after WT diagnosis. Standardized incidence ratios (SIRs) for solid tumors and leukemias were 5.1 and 5.0, respectively. Results for solid tumors for the 3 geographic areas were remarkably consistent; statistical tests for differences in incidence rates and SIRs were all negative. Age‐specific incidence rates and SIRs for solid tumors were lower for patients whose WT was diagnosed after 1980, although the trends with decade of diagnosis were not statistically significant. Incidence rates and SIRs for leukemia were highest among those diagnosed after 1990 (p‐trend = 0.003). These trends may reflect the decreasing use of radiation therapy and increasing intensity of chemotherapy in modern protocols for treatment of WT.