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Cancer is a disease that causes cells to grow and multiply uncontrollably in certain parts of the body. It may start in one part of the body and then spread to other areas. As a result, cancer can have a severe impact on the surrounding tissues and organs. Even though there is no complete cure for cancer, early detection and treatment can help the patient to a great extent and can save lives. Following are the most curable types of cancers:

1. Breast cancer: The 5-year relative survival rate for stage 0 and 1 breast cancer is 99–100 percent

2. Prostate cancer: Prostate cancers have a 99 percent 5-year relative survival rate at stages 1 and

3. Testicular cancer: The 5-year relative survival rate for testicular cancer is 99 percent for localized tumors, which are those in the testicles, and 96 percent for regional tumors, which have spread to tissues or lymph nodes close to the testicles

4. Melanoma: Melanoma has a 5-year relative survival rate of around 92 and 97 percent at stages 1A and 1B respectively.

5. Cervical cancer: Cervical cancer has a 93 percent 5-year relative survival rate at stages 0 and 1A

6. Hodgkin lymphoma: Hodgkin lymphoma has a 5-year relative survival rate of around 90 percent at stages 1 and 2.

Lung cancer is the “second most common cancer" diagnosed, says the Doctors in America. It has also been noted as the reason behind most number of deaths, which makes its early recognition and treatment very relevant. The recognition of early stages of lung cancer through CT and PET scans has been faulty and costly. This is when researchers brought in canines to the picture. Dogs with their accurate sniffing skills were introduced to smell and made to detect even early stages of cancer. Study was conducted by researchers training 4 beagles for a period of 8 weeks. After the training period, 3 dogs were tested by giving them blood samples collected from individuals with non-small cell lung cancer and a set of blood samples obtained from healthy individuals. And they successfully detected the cancer with 97.5% specificity, and 96.7% sensitivity. “Right now, it appears dogs have a better natural ability to screen for cancer than our most advanced technology. Once we figure out what they know and how, we may be able to catch up." Says Prof. Thomas Quinn.