Tumors can affect bones, skin, tissue, organs and glands. Many tumors are not cancer (they're benign). But they still may need treatment. Cancerous, or malignant, tumors can be life-threatening and require cancer treatment.
There is currently no cure for cancer. However, successful treatment can result in cancer going into remission, which means that all signs of it have gone. The early detection and treatment of cancer can significantly improve the chances of remission and a person's outlook.
The short answer is it varies from tumour to tumour. But overall, it's slower than you might expect. According to Professor Trevor Graham, a Cancer Research UK-funded cancer evolution expert, the best evidence for the fact that most cancers grow slowly comes from screening.
However, the only way to confirm whether a cyst or tumor is cancerous is to have it biopsied by your doctor. This involves surgically removing some or all of the lump. They'll look at the tissue from the cyst or tumor under a microscope to check for cancer cells.
Malignant tumors are cancerous. They develop when cells grow uncontrollably. If the cells continue to grow and spread, the disease can become life threatening.
Lumps that could be cancer might be found by imaging tests or felt as lumps during a physical exam, but they still must be sampled and looked at under a microscope to find out what they really are. Not all lumps are cancer. In fact, most tumors are not cancer.
It's important to talk with your doctor about any lumps that are larger than two inches (about the size of a golf ball), grow larger, or are painful regardless of their location. “Tell your doctor about new lumps or other symptoms that cannot be explained or that don't go away in a few weeks,” Dr. Shepard says.
In women, breast cancer lumps are usually found in the upper outer quadrant of the breast. In men, they're usually found near the nipple. Regardless of gender, breast cancer can start anywhere there's breast tissue, from the breastbone to the armpit to the collarbone.
See a GP if:
your lump is painful, red or hot. your lump is hard and does not move. your lump lasts more than 2 weeks. a lump grows back after it's been removed.
Sometimes breast lumps develop that are benign (noncancerous). Only 3% to 6% of breast lumps are due to breast cancer.
The smallest lesion that can be felt by hand is typically 1.5 to 2 centimeters (about 1/2 to 3/4 inch) in diameter. Sometimes tumors that are 5 centimeters (about 2 inches) — or even larger — can be found in the breast.
Tumor removal generally requires a larger incision, or cut, than a biopsy. Sometimes, there are less invasive surgical options for tumor removal, like laparoscopic surgery or robotic surgery. These use small instruments and incisions. With a less invasive surgery, you usually have less pain and recover faster.
'Most lumps are usually nothing to worry about,' says Dr Roshaan Saloojee, a Livi GP. 'But sometimes a lump may need treatment or immediate care. You should see a GP if you have concerns about a lump or if it persists for more than 2 weeks.
Cancerous lumps are hard and painless. They might seem to appear overnight and grow with time. A cancerous lump may block your windpipe or create pressure in the throat or nose. See your provider immediately if you notice these kinds of symptoms.
A lump or mass in the breast is the most common symptom of breast cancer. Lumps are often hard and painless, although some are painful. However, not all lumps are cancer. Benign breast conditions (like cysts) that can also cause lumps.
It is hard to believe that some cancers miraculously disappear, but it does happen. Over 1,000 case studies document cancer sufferers who experienced spontaneous regression of their tumour.
For example, certain types of skin cancer can be diagnosed initially just by visual inspection — though a biopsy is necessary to confirm the diagnosis. But other cancers can form and grow undetected for 10 years or more , as one study found, making diagnosis and treatment that much more difficult.
A breast lump that's painless, hard, irregularly shaped and different from surrounding breast tissue might be breast cancer. Skin covering the lump may look red, dimpled or pitted like the skin of an orange. Your breast size and shape may change, or you may notice discharge from the nipple.
Swelling from injury is one common form of skin lump. Most skin lumps are benign, meaning they're not cancerous. Skin lumps are generally not dangerous, and usually don't interfere with your everyday life. Talk to your healthcare provider or dermatologist if you're worried about any abnormal growths on your skin.
Cancer survival rates by cancer type
The cancers with the lowest five-year survival estimates are mesothelioma (7.2%), pancreatic cancer (7.3%) and brain cancer (12.8%). The highest five-year survival estimates are seen in patients with testicular cancer (97%), melanoma of skin (92.3%) and prostate cancer (88%).
Some people have cancer that can be controlled with treatment and they can live for a long time. If treatment stops working, the hope may change again. It may be hope for time to prepare family and loved ones who will be left behind, for telling them what they have meant to you and what you hope for their futures.
Many benign tumors don't need treatment, and the majority of those that do are curable. However, if left untreated, some benign tumors can grow large and lead to serious complications because of their size. Benign tumors can also mimic malignant tumors, and so for this reason are sometimes treated.