Yes, it is possible to have cancer for 20 years and not know it. This phenomenon is known as occult cancer, which is defined as the presence of cancer without any symptoms or signs. Occult cancer is often detected during investigations for another condition or during imaging tests such as X-rays or CT scans.
Symptoms of Occult Cancer
Occult cancer does not usually cause any symptoms, as it is an undetected form of cancer. However, some people may experience non-specific symptoms such as fatigue, unexplained weight loss, and pain.
Types of Occult Cancer
Occult cancer can involve any type of cancer, including breast, lung, prostate, and gastrointestinal cancer. It is more common in some types of cancer such as prostate cancer, where the cancer cells are slow-growing and may not cause symptoms until it has spread to other parts of the body.
Diagnosis of Occult Cancer
Occult cancer is diagnosed through a combination of imaging tests such as X-rays and CT scans, and blood tests such as tumor markers and circulating tumor cells tests. In some cases, a biopsy may be done to confirm a diagnosis.
Treatment of Occult Cancer
Treatment for occult cancer depends on the type and stage of the cancer. Treatment options may include surgery, radiation therapy, chemotherapy, and targeted therapy.