๐Ÿ›๏ธ Verified NIH Record โ€ข Updated 2026-06-30

Testing the Combination of Cediranib and Olaparib in Comparison to Each Drug Alone or Other Chemotherapy in Recurrent Platinum-Resistant Ovarian Cancer (NCT02502266)

A Randomized Phase II/III Study of the Combination of Cediranib and Olaparib Compared to Cediranib or Olaparib Alone, or Standard of Care Chemotherapy in Women With Recurrent Platinum-Resistant or -Refractory Ovarian, Fallopian Tube, or Primary Peritoneal Cancer (COCOS)

๐Ÿ”ต Active, Not Recruiting Phase2 / Phase3 ๐Ÿ’Š Investigational Drug / Biologic Sponsor: National Cancer Institute (NCI)

๐Ÿฉบ Plain-English Summary (8th-Grade Level)

This randomized phase II/III trial studies how well cediranib maleate and olaparib work when given together or separately, and compares them to standard chemotherapy in treating patients with ovarian, fallopian tube, or primary peritoneal cancer that has returned (recurrent) after receiving chemotherapy with drugs that contain platinum (platinum-resistant) or continued to grow while being treated with platinum-based chemotherapy drugs (platinum-refractory). Cediranib maleate and olaparib may stop the growth of tumor cells by blocking enzymes needed for cell growth. Chemotherapy drugs work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. It is not yet known whether giving cediranib maleate and olaparib together may cause more damage to cancer cells when compared to either drug alone or standard chemotherapy.

Who can join: Review the eligibility criteria below.

Location: University of Alabama at Birmingham Cancer Center โ€” Birmingham, Alabama

Age range: 18 Years

๐Ÿ“‹ "Do I Qualify?" โ€” 1-Minute Self Screener

Instant Checklist

Full eligibility criteria are available on the official NIH protocol. View the criteria โ†—

๐Ÿ“ All Participating Trial Locations (398 Sites)

Showing the first 25 of 398 sites.

  • University of Alabama at Birmingham Cancer Center โ€” Birmingham, Alabama
  • Alaska Women's Cancer Care โ€” Anchorage, Alaska
  • Providence Alaska Medical Center โ€” Anchorage, Alaska
  • University of Arkansas for Medical Sciences โ€” Little Rock, Arkansas
  • Sutter Auburn Faith Hospital โ€” Auburn, California
  • Alta Bates Summit Medical Center-Herrick Campus โ€” Berkeley, California
  • Mercy San Juan Medical Center โ€” Carmichael, California
  • Mercy Cancer Center - Elk Grove โ€” Elk Grove, California
  • Marin Cancer Care Inc โ€” Greenbrae, California
  • UC San Diego Moores Cancer Center โ€” La Jolla, California
  • Palo Alto Medical Foundation-Camino Division โ€” Mountain View, California
  • Palo Alto Medical Foundation-Gynecologic Oncology โ€” Mountain View, California
  • Kaiser Permanente-Oakland โ€” Oakland, California
  • Palo Alto Medical Foundation Health Care โ€” Palo Alto, California
  • Mercy Cancer Center - Rocklin โ€” Rocklin, California
  • Sutter Roseville Medical Center โ€” Roseville, California
  • Kaiser Permanente Downtown Commons โ€” Sacramento, California
  • Mercy Cancer Center - Sacramento โ€” Sacramento, California
  • Sutter Medical Center Sacramento โ€” Sacramento, California
  • University of California Davis Comprehensive Cancer Center โ€” Sacramento, California
  • Kaiser Permanente Sacramento Medical Center โ€” Sacramento, California
  • California Pacific Medical Center-Pacific Campus โ€” San Francisco, California
  • Kaiser Permanente-San Francisco โ€” San Francisco, California
  • UCSF Medical Center-Mission Bay โ€” San Francisco, California
  • Pacific Central Coast Health Center-San Luis Obispo โ€” San Luis Obispo, California

๐Ÿ’ฐ Cost, Insurance & Patient Rights

  • 100% Free Items: The investigational treatment and protocol-required procedures are supplied at zero cost by the sponsor.
  • Routine Patient Care: Under federal law (ACA ยง 2709) and many state statutes, routine care costs are covered during participation.
  • Voluntary Participation: You may withdraw at any time without affecting your standard medical care.

๐Ÿ’ก How to Participate

  1. Check the checklist above to see if you may qualify.
  2. Review the official NIH record below to find the coordinating site.
  3. Ask about the visit schedule, what is covered at no cost, and any travel support.
  4. Confirm with your own doctor before making a decision.
๐Ÿ›๏ธ View Official NIH Record โ†—