Pressurized Intraperitoneal Aerosolized Chemotherapy (PIPAC) in Patients With Peritoneal Metastasis From Pancreatic Adenocarcinoma

Study Summary

Palliative systemic therapy is the standard treatment option for patients with pancreatic ductal adenocarcinoma (PDAC) and peritoneal metastasis (PM), who have a median overall survival of only 6-11 months and a serious adverse event (SAE) rate of \>5%. Patients with peritoneal-only metastasis may demonstrate unique tumor biology with less potential for hematogenous and lymphatic spread, making them potential candidates for a regional approach directed at the peritoneum. PIPAC is a drug- delivery system that combines the pharmacokinetic advantages of low- dose intraperitoneal chemotherapy (high tumor tissue penetration with low systemic absorption/toxicity) with the principles of aerosolization (homogenous intraperitoneal distribution and deeper tissue penetration). PIPAC may offer a complimentary approach to maximize drug delivery to tumor implants, potentially improving quality of life and survival without significant additional morbidity. Several non-randomized studies have evaluated safety, feasibility, and efficacy of PIPAC with various intraperitoneal agents in a variety of tumor types. Very few patients with pancreatic cancer PM have been included in these studies and most have been treated with either PIPAC-oxaliplatin or doxorubicin/cisplatin. A recent phase 1 dose-escalation study included patients with ovarian, gastric, breast, and hepatopancreatobiliary malignancies. One patient with pancreatic cancer was included in this study. The recommended phase 2 dose was 140 mg/m2, with guidance to decrease the dose to 112.5 mg/m2 in patients with hepatic impairment. Therefore, the dose utilized in this study is 112.5 mg/m2. This recommendation was based on concern for nab-paclitaxel hepatotoxicity, but there was no data presented to support this expert recommendation. This study sets out to explore the role of PIPAC with nab-paclitaxel in combination with medical oncology choice standard of care therapy in this patient population.

Primary Outcome

DLTs are defined as any of the following events (based on CTCAE v5 and Clavien Dindo) during the first PIPAC cycle and attributable to PIPAC: Any grade 3 or 4 non-hematologic toxicity, excluding: Grade 3 nausea, vomiting, abdominal pain, or diarrhea that is adequately treated to grade 2 or lower within 48 hours. Grade 3 fatigue that returns to grade 2 or less within 7 days. Grade 3 laboratory/metabolic abnormalities that are not considered clinically significant or are easily correctable to

Interventions

• DRUG Nab-paclitaxel
• DEVICE PIPAC