A cancer diagnosis can feel confusing and stressful. Patients often want to know what the diagnosis means, how advanced the disease is, which tests are needed and what happens next. Understanding these steps can make conversations with the medical team easier and help patients make informed decisions. Cancer staging describes the extent of cancer in the body. Doctors consider the size and location of the tumour, nearby lymph nodes and whether the disease has spread to distant parts of the body. Staging systems vary according to cancer type, so a stage should always be interpreted in the context of the specific disease.