Surveillance for the detection of recurrent ovarian cancer: survival impact or lead-time bias?

OBJECTIVE

To compare the survival impact of diagnosing recurrent disease by routine surveillance testing versus clinical symptomatology in patients with recurrent epithelial ovarian cancer (EOC) who have achieved a complete response following primary therapy.

METHODS

We identified all patients who underwent primary surgery for EOC at two institutions between 1/1997 and 12/2004 and were diagnosed with recurrent disease following a complete clinical response to primary chemotherapy. Survival and post-recurrence management were compared between asymptomatic patients in which recurrent disease was diagnosed at a scheduled visit by routine surveillance testing and symptomatic patients in which recurrent disease was diagnosed based on clinical symptomatology at an unscheduled office visit or hospitalization.

RESULTS

Of the 121 patients that met inclusion criteria, 22 (18.2%) were diagnosed with a symptomatic recurrence. Median primary PFS was similar for asymptomatic and symptomatic patients (24.8 versus 22.6 months, P = 0.36); however, post-recurrence survival was significantly greater in asymptomatic patients (45.0 versus 29.4 months, P = 0.006). Secondary cytoreductive surgery (SCRS) was attempted equally in both groups (41% versus 32%, P = NS); however, optimal residual disease (<or=5mm) was more often achieved in asymptomatic patients (90% versus 57%, P = 0.053). On multivariate analysis, detection of asymptomatic recurrence was a significant and independent predictor of improved overall survival (P = 0.001). Median OS was significantly greater for asymptomatic patients (71.9 versus 50.7 months, P = 0.004).

CONCLUSIONS

In patients with platinum-sensitive EOC, detection of asymptomatic recurrences by routine surveillance testing was associated with a high likelihood of optimal SCRS in operative candidates and extended overall survival.