Postoperative Sr90 Irradiation of Pterygium

ABSTRACT

Between Oct. 1965 and Oct. 1970 467 eyes (450 patients) which recieved Sr90 (beta-ray) irradiation postoperatively were observed clinically at Severance hospital. 1) Among 467 eyes (450 patients), 321 eyes (68.7%) were referred to this hospital for postoperative beta-ray irradiation only (Fig.1). 2) 4500 rep of Sr90 were given to each eye in three equally divided doses. One 1st does was given about 24hours after surgery and the other two doses were given at one week inteintervals. 3) There was no significant sex difference in the number of patients-male (215 patients) and female (235 patient). 4) The oldest patient was 82 years and the yougest 16. 5) The greatest number of patients were between 31 and 40 year old (34.2%) and only one was over 81 year old (0.2%). 6) 230 left eyes were involved and 203 right eyes 17 patients had pterygium bilaterally (34 eyes). 7) 42 eyes had recurrent pterygium, there was no sex relationship in number of recurrences and no difference between right and left eyes developing recurrent pterigia. 8) Among 467 eyes which received post operatives sr90 irradiation, the incidence of recurrence was 2.8% (9 eyes).