Several of the cancer sites available in the Cancer Site menu can be broken down into sub-sites. When one of these cancer sites is chosen, the available sub-sites will be in this menu.
For example, if Colon and Rectum is selected from the Cancer Site listbox, the following options will be available in the Sub-site menu:
The first and default selection in the Sub-site menu will be the same site that is selected in the Cancer Site menu.
When creating graphs or tables by Cancer Site, the cancer sites that have sub-sites will have a plus (+) sign next to their names. Click on the plus sign to expand the list and show the available cancer sub-sites.