Edoxaban is a pill taken by mouth that helps prevent blood clots by blocking a protein needed for clot formation. In this study, it is being used to see if starting an oral anticoagulant improves outcomes for cancer patients who have a small, incidental pulmonary embolism.

Dalteparin is an injection given under the skin that acts as an anticoagulant, stopping the blood’s ability to form clots. The trial includes it as one of the injectable options being tested to determine whether early treatment with a subcutaneous anticoagulant is beneficial compared with not treating.

Tinzaparin is also a subcutaneous injection that works as an anticoagulant, helping to keep blood from clotting excessively. It is part of the group of injectable drugs evaluated in the study to assess the effects of starting anticoagulation in cancer patients with a small pulmonary embolism.

Apixaban is an oral tablet that prevents clot formation by inhibiting a key clotting factor. In the trial, it is examined as another pill option to see if beginning oral anticoagulation early improves survival and reduces complications.

Enoxaparin is a low‑molecular‑weight heparin given as a subcutaneous injection. It works by reducing the blood’s tendency to clot. The study uses it as one of the injectable anticoagulants to compare the benefits of treating versus not treating the embolism.

Rivaroxaban is a pill taken by mouth that blocks a clot‑forming protein, helping to keep blood thin. It is included in the trial as an oral anticoagulant option to evaluate whether starting treatment early helps cancer patients with an incidental subsegmental pulmonary embolism.

Subsegmental pulmonary embolism – A blockage of a small branch of the lung artery caused by a blood clot that travels from elsewhere in the body. The clot can reduce blood flow to a tiny region of lung tissue. Over time, the affected area may become less oxygen‑rich, leading to subtle changes on imaging. The clot may stay the same size, shrink, or dissolve on its own. Symptoms, if present, are often mild or absent, allowing the condition to be discovered incidentally during scans.
Malignant neoplasm – An abnormal growth of cells that have the ability to invade nearby tissues and spread to other parts of the body. The tumor usually begins as a small mass that enlarges as cells divide uncontrollably. As it grows, it can affect the function of the organ where it started. Cells may break away and travel through the bloodstream or lymphatic system to form new growths elsewhere. The disease progresses through stages that reflect its size and spread.