Volume 20, Issue 1 pp. 75-86
Original Article
Full Access

Neoplasms in neurofibromatosis 1 are related to gender but not to family history of cancer

Gladstone E. Airewele

Gladstone E. Airewele

Department of Epidemiology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas

Texas Children’s Cancer Center, Baylor College of Medicine, Houston, Texas

Department of Pediatrics, Baylor College of Medicine, Houston, Texas

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Alice J. Sigurdson

Alice J. Sigurdson

Department of Epidemiology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas

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Karen J. Wiley

Karen J. Wiley

Department of Epidemiology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas

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Blake E. Frieden

Blake E. Frieden

Department of Epidemiology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas

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Lauren W. Caldarera

Lauren W. Caldarera

Department of Epidemiology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas

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Vincent M. Riccardi

Vincent M. Riccardi

American Medical Consumers, La Crescenta, California

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Richard Alan Lewis

Richard Alan Lewis

Department of Pediatrics, Baylor College of Medicine, Houston, Texas

Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas

Department of Ophthalmology, Baylor College of Medicine, Houston, Texas

Department of Medicine, Baylor College of Medicine, Houston, Texas

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Murali M. Chintagumpala

Murali M. Chintagumpala

Texas Children’s Cancer Center, Baylor College of Medicine, Houston, Texas

Department of Pediatrics, Baylor College of Medicine, Houston, Texas

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Joann L. Ater

Joann L. Ater

Department of Pediatric Hematology and Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas

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Sharon E. Plon

Sharon E. Plon

Texas Children’s Cancer Center, Baylor College of Medicine, Houston, Texas

Department of Pediatrics, Baylor College of Medicine, Houston, Texas

Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas

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Melissa L. Bondy

Corresponding Author

Melissa L. Bondy

Department of Epidemiology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas

Department of Epidemiology, Box 189, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030-4095===Search for more papers by this author

Abstract

The risk of malignancies among persons with neurofibromatosis 1 (NF1) is higher than in the general population, but the excess risk has not been precisely estimated. The effects of gender and inheritance pattern on cancer risk are unclear. Therefore, we conducted a historical cohort study to determine cancer risk factors by contacting 138 Caucasian NF1 patients originally seen at Baylor College of Medicine (BCM) in Houston between 1978 and 1984. A total of 304 patients of all ethnic groups were evaluated at BCM during this period. We successfully located 173 patients, 138 of who were Caucasian. We computed standardized incidence ratios (SIRs) with the age-, gender-, and time period-specific rates from the Connecticut Tumor Registry for 2,094 person-years of observation (median follow-up = 16 years). Eleven incident tumors were reported. Females were at much higher risk of cancer than males (SIR = 5.6, 95% confidence interval (CI) 2.7–10.3 and SIR = 0.6; 95% CI, 0.0–3.0, respectively). We found no elevated cancer risk in unaffected first-degree relatives, regardless of whether the proband had cancer or not (SIR = 1.1 95% CI, 0.6–1.8 and SIR = 1.0, 95% CI, 0.6–1.5, respectively). Our results suggest that malignancy in the proband is not the result of a modifying gene that has a significant impact on general cancer risk. Genet. Epidemiol. 20:75–86, 2001. © 2001 Wiley-Liss, Inc.

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