Sociodemographic and clinical characteristics of patients
A total of 176 consecutive patients with retinoblastoma were registered. One incomplete file was excluded; thus, 175 children were evaluated. The ratio between the sexes was 1.03 (89 boys and 86 girls). The median age at diagnosis was 33 months (range: 2-108; IQR: 23-45). Urban residence was reported in 118 cases (67.4%), and the median distance between the usual residence and the care center was 30 km (range: 1-1000; IQR: 10-116). The parents were married in 83.3% of cases (105/126). Moreover, care was financed by families in 86.9% of cases (126/145), with social solidarity systems (mutual insurance company, social security fund, employer, etc.) being less frequent.
The median number of siblings was 4 children (range: 2-12; IQR: 2-5). The median rank of the sick child among his/her siblings was 3 (range: 1-12; IQR: 2-4). Unilateral affection occurred in 156 cases of retinoblastoma (89.1%), and bilateral affection occurred in 19 cases (10.9%). Regarding staging, retinoblastoma was intraocular in 45.7% of cases (80/175) and extraocular in 54.3% (95/175).