What does cancer latency mean?
The latency period for cancer is defined as the amount of time that elapses between the initial exposure to a carcinogen (cancer-causing substance) and the diagnosis of cancer.
What is the latent period for most radiation induced cancers?
We do know that radiation-induced cancers do not appear until at least 10 years after exposure (for tumors) or 2 years after exposure (for leukemia).
What is latency period in reference to ionizing radiation?
The time interval between exposure and cancer appearance is called the latent period. While leukemia is characterized by the shortest latent period (7–12 years), solid tumors show longer latency (10–50 years). Ionizing radiation can induce different cancer types.
Which radiation induced cancers have the shortest latency period in exposed adults?
The shortest latency periods have been observed for radiation-induced leukaemias and thyroid cancer.
What is the latency for leukemia?
The latency period for induction of leukemia is 5–7 years, and for solid tumours is at least 10 years, so cancers occurring earlier than this should be considered to be naturally occurring rather than induced by radiation exposure.
What does long latency period mean?
The time that passes between being exposed to something that can cause disease (such as radiation or a virus) and having symptoms.
What is the latency period of leukemia?
What follows after the latency period?
In some diseases, as depicted in this diagram, the latency period is shorter than the incubation period. After the latency period (but prior to clinical infection) the infected person can transmit the disease without signs of any symptoms. Such infection is called subclinical infection.
What is latency disease?
(LAY-ten-see PEER-ee-ud) The time that passes between being exposed to something that can cause disease (such as radiation or a virus) and having symptoms.
Is latency good or bad?
Latency is measured in milliseconds (ms), so if your ping is “100ms” then it takes 100 milliseconds for your device to respond to a request from the hosting server. Lower latency, also known as ping, is desirable to achieve that smoother gameplay and user experience we all want, without an lag.
How long does it take for leukemia to develop after radiation?
Later on, after many years, solid tumors were diagnosed. Similarly in irradiated patients, latent period for the development of secondary leukemia is around 5–10 years while that for solid tumors is around 10–60 years [13,30]. 4. Radiation technique Use of older radiation techniques have been shown to increase the risk of RISM .
What is the latency period of cancer?
Understanding the latency period also helps to explain one of the reasons why it is so difficult to study causation with cancer. If we were to begin a study today looking at a particular substance, we may not have results for decades. For example, at least 40 years if the latency period of a carcinogen was 40 years.
What are the key determinants of radiation-induced cancer risk?
In addition to the type of tissue exposed and radiation dose, the time period over which the exposure occurs and the time after exposure are the key determinants of radiation induced cancer risk.
How do we assess minimum latency periods for carcinogens?
The assessment of minimum latency periods for types of cancer is straightforward when exposures occur at a single point in time or regularly. However, most human exposures to carcinogens vary significantly over time, making a precise determination of minimum latency periods difficult.