Last updated on July 2020

ASA in Prevention of Ovarian Cancer (STICs and STONEs)


Are you eligible to participate in this study?

You may be eligible for this study if you meet the following criteria:

  • Conditions: Ovarian Cancer Prevention
  • Age: Between 18 - 100 Years
  • Gender: Female

Inclusion Criteria:

  • Previously documented germline BRCA1/2 pathogenic mutation or likely pathogenic variant based on the ACMG 2015 guidelines
  • Risk-reducing surgery (bilateral salpingo-oophorectomy or bilateral salpingectomy inclusive of fimbria) scheduled for within 6 months to 2 years after the date of randomization as standard of care, for women who have completed their families
  • ECOG performance status 0 or 1
  • Age 18 years old
  • Subject is able (i.e. sufficiently literate) and willing to complete the Credibility/Expectancy questionnaire in English or French.
  • Subject consent must be appropriately obtained in accordance with applicable local and regulatory requirements. Each subject must sign a consent form prior to enrollment in the trial to document their willingness to participate
  • Subjects must be accessible for treatment and follow up. Subjects randomized on this trial must be treated and followed at the participating centre.
  • In accordance with CCTG policy, protocol treatment is to begin within 2 working days after subject randomization
  • Women of childbearing potential must have agreed to use a highly effective contraceptive method for the duration of the study treatment and for 30 days post last dose of study medication

Exclusion Criteria:

  • Subjects with history of other malignancies, except:
  • adequately treated non-melanoma skin cancer;
  • curatively treated in-situ cancer of the cervix;
  • previously diagnosed (at any point) breast cancer, treated with curative intent; prior chemotherapy is allowed and the last dose must be 12 months prior to randomization; endocrine therapy for breast cancer is allowed at any time.
  • other solid tumours curatively treated with no evidence of disease for > 5 years.
  • Subjects who have been treated with any PARP-inhibitors (e.g. olaparib) at any time.
  • Subjects with active bleeding or bleeding diathesis.
  • Subjects with active peptic ulcer.
  • Subjects with renal, hepatic or congestive heart failure.
  • Subjects with concurrent use of anti-coagulants and/or anti-platelet agents.
  • Subjects with prior bilateral salpingectomy.
  • Subjects with history of chronic daily use of ASA or NSAIDs.
  • Subjects with intolerance of ASA including subjects with a history of asthma induced by salicylates or substances with a similar action, notably non-steroidal-anti-inflammatory drugs.
  • Ongoing or planned pregnancy.
  • Subjects who are breastfeeding.

Recruitment Status: Open


Brief Description Eligibility Contact Research Team


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