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Related Concept Videos

Mutations01:35

Mutations

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Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
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Mutations01:39

Mutations

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Skin Cancer01:30

Skin Cancer

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Skin cancer is a type of cancer that occurs when there is an abnormal growth of skin cells, usually triggered by damage to the DNA within the skin cells. It is primarily caused by exposure to ultraviolet (UV) radiation from the sun or artificial sources like tanning beds. Skin cancer is the most common type of cancer worldwide, and its incidence continues to rise.
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Biological Effects of Radiation02:59

Biological Effects of Radiation

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All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
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Cancer Prevention02:59

Cancer Prevention

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Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
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Mechanisms of Retrovirus-induced Cancers01:51

Mechanisms of Retrovirus-induced Cancers

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Retroviruses are RNA viruses that have been shown to cause cancers in diverse species, including chickens, mice, cats, and monkeys. The RNA genomes of these viruses are first reverse-transcribed into single and then double-stranded DNA (dsDNA) copies. This dsDNA called proviral DNA then integrates into the host genome. Subsequently, the host cell transcribes the proviral DNA in concert with the chromosomal DNA. This leads to the production of viral RNA and proteins that assemble at the host...
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Detecting Anastasis In Vivo by CaspaseTracker Biosensor
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Radiation-induced second malignancies.

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This summary is machine-generated.

Second malignancies, particularly radiation-induced cancers, are increasingly common. Early detection and careful radiotherapy techniques are crucial for successful patient outcomes.

Keywords:
Radiation-inducedre-irradiationreviewsecond malignancies

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Area of Science:

  • Oncology
  • Radiation Oncology
  • Cancer Epidemiology

Background:

  • Second malignancies constitute a growing proportion of new cancer diagnoses, affecting approximately one in six patients.
  • Etiologies of second malignancies include treatment-related factors, genetic syndromes, and shared environmental exposures.

Observation:

  • This review specifically examines radiation-induced malignancies, presenting cases of thyroid cancer, rectal cancer, and sarcoma.
  • Radiation-induced secondary cancers are typically identified within the prior radiation treatment field.
  • The latency period between initial radiotherapy and the development of secondary malignancies ranges from 8 to 21 years.

Findings:

  • Illustrative case scenarios demonstrate the detection and management of radiation-induced secondary cancers.
  • Secondary malignancies are consistently found within the irradiated area, highlighting the localized impact of radiation therapy.

Implications:

  • Reducing radiation-induced malignancies necessitates careful patient selection and optimized radiotherapy techniques.
  • Vigilant follow-up and timely investigations are essential for early detection and improved treatment success rates of secondary cancers.