Brain cancers are staged* according to their cell type and grade because they seldom spread to other organs. While other cancers, such as breast or lung cancer, are staged according to so-called TNM (Tumor – Node – Metastasis) staging which is based on the location and spread of cancer cells.
In general, these cancer stages range from 0 to 4; with stage 4 indicating the cancer has spread to another organ.
(*The stage describes, the level of the cancer developed in the body.)
