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Incidence of Retinoblastoma in the United States: 1975-2004
  1. Erin Broaddus (ecb16{at}case.edu),
  2. Allan Topham (atopham{at}ecogchair.org),
  3. Arun D Singh (singha{at}ccf.org)
  1. Cole Eye Institute, Cleveland Clinic Foundation, United States
  2. Coalition of National Cancer Cooperative Group Inc., United States
  3. Cole Eye Institute, Cleveland Clinic Foundation, United States

    Abstract

    Background: The purpose of this study was to determine the age-adjusted incidence of retinoblastoma in the United States over a 30-year period from 1975 to 2004 using a review of existing databases.

    Methods: Six hundred fifty-eight patients with retinoblastoma (International Classification of Oncology [ICDO-3] codes C69.2 [retina] and C69.9 [eye, NOS]) were derived from the Surveillance, Epidemiology, and End Results (SEER) program database in the United States from 1975 to 2004. Nine historical SEER registries were utilized. The significance of trend in age-adjusted incidence rate was determined using chi-square test, and 95% confidence intervals were calculated. The patients were stratified according to age at diagnosis, laterality, gender, and race.

    Results: There were a total of 658 cases of retinoblastoma, representing 6.1% of all childhood cancers under age 5 years. The mean age-adjusted incidence of retinoblastoma in the United States was 11.8 per million children ages 0-4 years (10.9-12.8; 95% CI). There was no significant trend in age-adjusted incidence for all races/ genders, nor was there any significant variation of incidence between races or between genders. The proportion of bilateral cases (26.7%) versus unilateral cases (71.9%) remained stable over the 30 year period.

    Conclusions: The mean age-adjusted incidence rate of retinoblastoma of 11.8 cases per million children ages 0-4 years in the United States is similar to rates reported from European countries. The age-adjusted incidence rate of retinoblastoma in the United States has remained stable for the last 30 years.

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