abstract:
The influence of age and other prognostic factors associated with survival of ovarian immature teratoma - A study of 1307 patients
OBJECTIVE:
To determine impact of age and other prognostic factors on the survival of ovarian immature teratoma (IT) patients.
METHODS:
Data
obtained from the SEER database between 1973 and 2012. Kaplan-Meier
methods and multivariate Cox regression models were used for statistical
analyses.
RESULTS:
Of
1307 patients (median: 24years; range:
0-93), 78%, 5%, 13%, 4% were
stages I, II, III and IV, respectively. 25%, 35%, and 40% had grades 1,
2, and 3. Whites were less likely to be diagnosed, and
Asians had a
nearly 3-fold higher proportion of IT compared to the proportion of
Asians in the U.S. census. The 5-year disease-specific survival (DSS)
was 91.2%. Those with stages I, II, III and IV disease had survivals of
99.7%, 95%, 81%, and 71.8% (p<0.001) and grades 1, 2, and 3 had DSS
of 98.7%, 95.8%, and 91% (p<0.001), respectively. Of those who
underwent fertility-preserving surgery, the DSS was 98.8%. Over time
from 1973 to 1986, to 1987-1999, to 2000-2012, the survivals were 76.4%,
92.8%, and 94.7% (p<0.001). Of stage I patients, no patient
<18years (n=214, used as adult cutoff) and 2 of 283 patients
>18years died of cancer, with corresponding 5years DSS of 100% vs.
99.6% (p>0.05). Older age (by year, HR: 1.05; 95% CI: 1.04-1.06;
p<0.0001) and higher stage (HR: 11.52; 95% CI: 4.08-32.48;
p<0.0001) were independent factors indicating poorer survival.
CONCLUSION:
The
outcome of patients with stage I disease was excellent at 99.7%, with
children and adults having corresponding survivals of 100% and 99.6%.
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