Do blood thinners help or hurt when cancer meets a clot?

This study looks back at medical records of children and young adults with solid tumors or lymphoma who also have a tumor thrombus—a blood clot that forms in a vein due to tumor pressure or invasion. Researchers will gather data on who received blood thinners or procedures like stents, and track outcomes such as bleeding, clot growth, and survival. The goal is to better understand how these clots are managed and what approaches may be safest.