At what age could screening for familial retinoblastoma be stopped? A register based study 1945-98

Aim-To evaluate until what age children in families with retinoblastoma sho uld be screened. Methods-A register based cohort (n = 685) study of Dutch retinoblastoma pat ients (1945-1998). The records of all familial hereditary retinoblastoma pa tients from 1945 were reviewed and the age at diagnosis and either they wer e screened from birth determined. Results-75 patients had the familial hereditary form of retinoblastoma. The mean age at diagnosis in patients with fundus screening (n=50) from birth on was 4.9 months (median 1.9 months; range 1 day to 48 months). Thus, 4 ye ars was the latest onset of familial retinoblastoma properly evaluated from birth. This mean age was significantly different (p<0.0001) from the mean age at diagnosis in patients without fundus screening (n=25) from birth (me an 17.2 months; median 10.0 months; range 1.5-63.0 months). Conclusions-Ophthalmological screening of children and sibs at risk for fam ilial hereditary retinoblastoma is recommended until the age of 4 years in order to detect retinoblastoma as early as possible.