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Cancer in adolescents and young adults is cancer which occurs in those between the ages of 15 and 39. [1] This occurs in about 70,000 people a year in the United States—accounting for about 5 percent of cancers. This is about six times the number of cancers diagnosed in children ages 0–14. [1]
Adolescent and young adult oncology is a branch of medicine that deals with the prevention, diagnosis, and treatment of cancer in adolescent and young adult (AYA) patients aged 16–40. Studies have continuously shown that while pediatric cancer survival rates have gone up, the survival rate for adolescents and young adults has remained stagnant.
Adolescent and young adult oncology (AYA): AYA is a branch of medicine that deals with the prevention, diagnosis, and treatment of cancer in adolescents and young adults, often defined as those aged 13–30. Studies have continuously shown that while pediatric cancer survival rates have gone up, the survival rate for adolescents and young ...
Approximately 50% of all cancer cases in the Western world can be treated to remission with radical treatment. For pediatric patients, that number is much higher. A large number of cancer patients will die from the disease, and a significant proportion of patients with incurable cancer will die of other causes.
Grading in cancer is distinguished from staging, which is a measure of the extent to which the cancer has spread. Pathology grading systems classify the microscopic cell appearance abnormality and deviations in their rate of growth with the goal of predicting developments at tissue level (see also the 4 major histological changes in dysplasia ).
G (1–4): the grade of the cancer cells (i.e. they are "low grade" if they appear similar to normal cells, and "high grade" if they appear poorly differentiated) S (0–3): elevation of serum tumor markers; R (0–2): the completeness of the operation (resection-boundaries free of cancer cells or not) Pn (0–1): invasion into adjunct nerves
The corresponding relative risk is 1.5 for lung cancer, [83] and 1.9 for prostate cancer. [84] For breast cancer, the relative risk is 1.8 with a first-degree relative having developed it at 50 years of age or older, and 3.3 when the relative developed it when being younger than 50 years of age. [85]
This category includes pediatric cancers, (including benign neoplasms) in fetuses, infants, children, teens, and young adults. Note that most pediatric cancers are also rare cancers: see Category:Rare cancers.