Prospective Study of Sinonasal and Skull-base Tumours Management

This study collects data to better understand how doctors manage cancers in the sinuses, nose, and skull base — a complex region of the head. It aims to improve treatment approaches by tracking outcomes over time. **You may be eligible if...** - You have a cancer affecting the sinuses, nasal cavity, or skull base - Your cancer has grown into or through the skull base area - You can provide written informed consent **You may NOT be eligible if...** - Your skull-base cancer started in the temporal bone (ear region) and does not involve the central skull base Talk to your doctor to see if this trial is right for you.