A group of cancers that affect blood cells and bone marrow are known as blood cancer. There are more than 100 types of blood cancers, but the most common are leukemia, lymphoma, and myeloma. Abnormal and rapid growth of blood cells causes these cancers.

Abnormal blood cells cannot perform their regular role and cannot fight against infections. Hence, the body's immunity system becomes weak.

Leukemia is the most common cancer among children. The incidence rate starts to rise with people around 55 years and higher with people 85-89 years.

Blood cancers are not curable, but treatment can enhance the quality of life. Chemotherapy, radiation therapy, stem cell transplants, or antibiotics are used to treat blood cancer. The treatment may continue for months or years.

The life expectancy of a blood cancer patient depends on some factors like the patient's age, the type of blood cancer, stage, genetic mutation, progression of cancer, family history, tobacco use, exposure to certain chemicals, response to treatment, other health conditions, and lifestyle of the patient.

Life expectancy in pediatric patients is higher than in adults. According to the American Cancer Society, the 5-year survival rate is almost 90% for children and 70% for adults. It may vary from patient to patient. Sometimes two patients with the same clinical conditions may have a different life expectancy.