DISTRIBUTION OF TUMORS IN THE RETINA IN HEREDITARY RETINOBLASTOMA PATIENTS

We have compared the location of the ocular tumors in hereditary retin oblastoma in relation to the age of the patients at time of diagnosis. Eighty fundus drawings were analyzed from 59 hereditary patients cont aining 159 tumors. At the time of diagnosis, indirect oph- thalmoscopy was performed under general anaesthesia in all patients and standard drawings of the retina were made depicting the number and relative loc ation of all tumors. The distance between the center of the tumor and the center of the macula was measured and plotted against the age of t he patients at time of diagnosis. The results show that the distance b etween the center of the tumor and the center of the macula at time of diagnosis increases with age during the first seven months after birt h.