| Total cases | n = 658 (only nine historical SEER registries utilised) | ||
| Codes† | Morphology: | Retinoblastoma | 9510 to 9513 |
| Topography: | Retina | C69.2 to 650 cases | |
| Eye, NOS | C69.9 to 8 cases | ||
| Reporting source | Hospitals | 650 (98.8%) | |
| Physician office | 6 (0.9%) | ||
| Others (death cert, autopsy) | 2 (0.2%) | ||
| Diagnosis | Microscopic confirmation | 590 (89.7%) | |
| Clinical (visualisation, radiology) | 64 (9.7%) | ||
| Unknown | 4 (0.6%) | ||
| Distribution | Gender | Males | 323 (49.1%) |
| Females | 335 (50.9%) | ||
| Race | Caucasians | 483 (73.4%) | |
| Black individuals | 94 (14.3%) | ||
| Other/unknown | 81 (12.3%) | ||
| Age groups | 0 to 4 | 630 (95.7%) | |
| 5 to 9 | 28 (4.3%) | ||
These cases represented 6.1% of all childhood cancers under age 5 years, and 4.13% of all childhood cancers under age 10 years. Most cases (98.8%) were reported by the hospitals, and histopathological confirmation was available in 89.7% of cases. The cases were almost equally distributed between males and females (males = 323 (49.1%), females = 335 (50.9%)). Most cases (73.4%) occurred in the Caucasian population (table 2).
*Surveillance, Epidemiology and End Results (SEER) Program (http://www.seer.cancer.gov) SEER Stat Database: Incidence—SEER 17 Regs Limited-Use, November 2006 Sub (1973–2004 varying)—Linked to County Attributes—Total US, 1969–2004 Counties, National Cancer Institute, DCCPS, Surveillance Research Program, Cancer Statistics Branch, released April 2007, based on the November 2006 submission.
†International Classification of Oncology (ICDO), 3rd edn.