Does HE4 have a role in the recurrence of ovarian cancer?

Abstract

e15550 Background: Human epididymis protein 4 (HE4) has been recently described as a new marker for early ovarian cancer, with higher sensitivity (76.9%) compared to CA125. This is the third study in literature on the role of HE4 in recurrence of ovarian cancer and the first evaluating the sensitivity of HE4 and CA125 in these patients Methods: Plasma was obtained 24 hours before secondary cytoreductive surgery from consecutive patients with suspicious recurrence ovarian cancer operated from November 2010 to April 2011 at University Campus Bio-Medico of Rome. CA125 levels were evaluated by a one-step "sandwich" radioimmunoassay. HE4 levels were determined using the HE4 enzymatic immune assay. The CA125 cut-off was less than 35 U/mL. Two cut-off were considered for HE4: less than 150 pmol/L (according to the manufacturer's indications) and less than 70 pmol/L. Results: Fourteen patients were histologically confirmed as recurrence ovarian cancer. Mean Ca125 plasma concentration was 31.95 ± 22.09 U/mL (range 1.1 – 64.3). Mean HE4 plasma concentration was 225.83± 286.82 pmol/L (range 21.61- 633.6). The sensitivity of CA125 was 35.7 %. The sensitivity of HE4 was 71.4% and 28.6% above the cut-off of 70 pmol/L and 150 pmol/L, respectively. The dual marker combination of CA125 and HE4 at 70 pmol/L cut-off yielded the highest sensitivity (85.7%) to detect recurrence ovarian cancer. Conclusions: Even if a standard cut-off point has not been determined, this study suggested that HE4 may potentially be a more sensible marker for recurrence ovarian cancer than CA125 and the association between CA125 and HE4 at cut-off of 70 pmol/L seems to yield the highest sensitivity.