HIPEC associated with longer Overall survival for patients with advanced-stage ovarian cancer

To evaluate the safety and effectiveness of ICS with HIPEC compared with ICS alone in clinical practice for patients with advanced-stage ovarian cancer, Lee J, Lee YJ, Son J, et al carried out a prospective, multicenter, comparative effectiveness cohort study that enrolled 205 patients with stage III or IV ovarian cancer who had received at least 3 cycles of neoadjuvant chemotherapy followed by ICS with HIPEC or ICS without HIPEC at 7 Korean Gynecologic Oncology Group institutions between September 1, 2017, and April 22, 2022. Nine patients were excluded because they did not meet the inclusion criteria.

Neoadjuvant chemotherapy followed by ICS with HIPEC or ICS without HIPEC. The primary end point was progression-free survival (PFS). Overall survival (OS) and the safety profile were the key secondary end points.

• This study included 196 patients (median age, 58.0 years [range, 38-82 years]), of whom 109 underwent ICS with HIPEC and 87 underwent ICS without HIPEC.

• The median duration of follow-up was 28.2 months (range, 3.5-58.6 months). Disease recurrence occurred in 128 patients (65.3%), and 30 patients (15.3%) died.

• Interval cytoreductive surgery with HIPEC was associated with a significant improvement in median PFS compared with ICS without HIPEC (22.9 months [95% CI, 3.5-58.6 months] vs 14.2 months [95% CI, 4.0-56.2 months]; P = .005) and median OS (not reached [95% CI, 3.5 months to not reached] vs 53.0 [95% CI, 4.6-56.2 months]; P = .002).

• The frequency of grade 3 or 4 postoperative complications was similar in both groups (ICS with HIPEC, 3 of 109 [2.8%] vs ICS without HIPEC, 3 of 87 [3.4%]; P > .99).

• Among patients with recurrence, the frequency of peritoneal recurrence was lower in the ICS with HIPEC group than in the ICS without HIPEC group (21 of 64 [32.8%] vs 41 of 64 [64.1%]; P = .001).

This study suggested that ICS in conjunction with HIPEC was associated with longer PFS and OS than ICS without HIPEC for patients with advanced-stage ovarian cancer and was not associated with higher rates of postoperative complications. The lower rate of peritoneal recurrence after HIPEC may be associated with improved OS.

Source: Lee J, Lee YJ, Son J, et al. Hyperthermic Intraperitoneal Chemotherapy After Interval Cytoreductive Surgery for Patients With Advanced-Stage Ovarian Cancer Who Had Received Neoadjuvant Chemotherapy. JAMA Surg. Published online September 06, 2023. doi:10.1001/jamasurg.2023.3944