Treatment Algorithm in Cancer-Associated Thrombosis: Updated Canadian Expert Consensus.

Patients with cancer-associated thrombosis (CAT) are at high risk of recurrent venous thromboembolism (VTE) and major bleeding complications. Risks vary significantly between individuals based on cancer status, treatment, and other characteristics. To facilitate the evidence-based management of anticoagulant therapy in this patient population, a committee of 11 Canadian clinical experts updated a consensus-based algorithm for the acute and extended treatment of symptomatic and incidental CAT that was developed in 2018. Following a systematic review of the literature, updates to the algorithm were discussed during an online teleconference, and the algorithm was subsequently refined based on feedback from committee members. Clinicians using this treatment algorithm should consider bleeding risk, type of cancer, and drug-drug interactions, as well as patient and clinician preferences, in tailoring anticoagulation for patients with CAT. Anticoagulant therapy should be adapted as the patient's cancer status and management change over time.

Direct Oral Anticoagulants in Cancer Patients.

Cancer-associated thrombosis (CAT) is a common occurrence in the journey of a cancer patient and its management poses significant challenges. Low molecular weight heparin (LMWH) is the standard of care but the high cost and the inconvenience of daily injections have led to low persistence with therapy. Direct oral anticoagulants (DOACs) are effective and safe for the treatment of venous thromboembolism (VTE) compared with vitamin K antagonist (VKA) therapy in noncancer patients, and emerging data comparing their use with LMWH in CAT are rapidly changing clinical practice. Recent randomized controlled trials also reported that specific DOACs are effective for primary prevention of CAT in patients undergoing systemic cancer therapy, but this benefit might be offset by an increased risk of bleeding. Undoubtedly, the option of an effective and safe oral anticoagulant is appealing to physicians and patients but critical limitations of DOACs, particularly bleeding and drug-drug interaction, need careful consideration. Understanding the scientific data, as well as each patient's preferences and values, are paramount in individualizing therapy in this special population of patients. This review summarizes the current evidence for DOACs for the treatment and prevention of CAT, discusses the importance of careful patient selection, and highlights upcoming new studies that will inform guideline recommendations.