Retrospective analysis of patients with nasopharyngeal carcinoma treated during 1976-1985: survival after local recurrence.
OBJECTIVE
To study the value of re-irradiation, the overall survival and pattern of failures for patients with nasopharyngeal recurrence.


METHODS
All the 891 patients with local recurrence following radiotherapy for nasopharyngeal carcinoma during 1976-1981 were retrospectively analyzed. Only 70% of them had local failure alone at the time of detection, and the T-stage distribution (by Ho's system) was 31% rT1, 16% rT2, 51% rT3, and 1% rT?. Seven hundred and six (79%) patients had been re-irradiated with various techniques and doses. Among those who failed, 50 had further irradiation.


RESULTS
The overall 5- and 10-year actuarial cancer-specific survival rates were 14% and 9%, respectively. Patients with rT3 disease had the worst prognosis. Successful local salvage was achieved in 32% of those re-irradiated (26% of the whole series). The highest control rate was achieved by those treated with external radiotherapy to 60 Gy (equivalent) or above. Only 8/50 patients responded to the third course of radiotherapy. The cumulative incidence of late post-re-irradiation sequelae was 24%, and the treatment mortality rate 1.8%. Besides local failure, 54% had regional relapse and/or distant metastasis. Thus, only 16% of recurrent patients were totally disease-free at final assessment.


CONCLUSIONS
The overall prognosis for patients with nasopharyngeal recurrence was grave. High dose re-irradiation could achieve successful local salvage in a substantial number of patients with early recurrence, but late complications did occur. Furthermore, high incidence of failure at other sites was observed.
Lee
A W
AW
Institute of Radiology and Oncology, Queen Elizabeth Hospital, Kowloon, Hong Kong.
Law
S C
SC
Foo
W
W
Poon
Y F
YF
Cheung
F K
FK
Chan
D K
DK
Tung
S Y
SY
Thaw
M
M
Ho
J H
JH
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001918:Brachytherapy; D002294:Carcinoma, Squamous Cell / Q000453:epidemiology / Q000532:radiotherapy*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009303:Nasopharyngeal Neoplasms / Q000453:epidemiology / Q000532:radiotherapy*; D009364:Neoplasm Recurrence, Local / Q000188:drug therapy* / Q000453:epidemiology / Q000532:radiotherapy*; D012189:Retrospective Studies; D016019:Survival Analysis; D015996:Survival Rate