Some cancers cannot be prevented. Other cancers, such as bladder cancer, lung cancer, and throat cancer, are related to smoking. Avoiding tobacco products in all forms may help prevent these cancers.
For the cancers that cannot be prevented, finding the cancer in an early stage is very important to ensuring successful treatment. Routine breast self-exams, mammograms, Pap smears, and testicular self-exams can help to find cancers in an early stage.
Carcinoma in situ is likely to invade nearby tissue and spread to other parts of the body. Cancer that has spread, also known as metastasized, is fatal if it is not treated.
There is no risk to others from a person who has carcinoma in situ.