A cancer which arises in glandular cells, this type of cancer can behave in unusual ways. It can spread from the sinuses and skull base and be locally aggressive like other cancer. It can also spread to lymph nodes, and can even “skip” to other places such as the lungs and bones of the body. Some people may have no symptoms of this cancer spreading beyond the sinuses and skull base, but it is important to consider these areas in the workup.