Also, most centers use one of two staging systems.

There is no standard staging system for adult brain tumors.

Some cancers, such as lymphomas, have a different staging system.

The area where the tumor is found and the child's age are used in place of a staging system to plan cancer treatment.

The following staging system is sometimes useful when managing lesions.

A staging system for established cancer might also be based on genetic mutations.

Some staging systems cover many types of cancer; others focus on a particular type.

It is more of a prognostic index rather than a true staging system.

This staging system is described in Table 2 below.

The staging system and incidence by stage are outlined below.