Can anyone tell me about predictive and presymptomatic test / diagnosis of cancer?

hypnonebula,
An evaluation from a geneticist, psychologist, psychiatrist, neurologist, and/or a social worker should be done to evaluate your need or reason for wanting to have a predictive genetic test done. The type of information presented during pretest counseling can include information about the disorder, the predictive test, possible psychological impacts, and the limitations and substantial elements of uncertainty that are linked to the test. Predictive and presymptomatic genetic testing is done to detect for gene mutations that can leave a person susceptible to disease later on in life. For this type of genetic testing, knowing the medical conditions that are present in your family history is important because it can help evaluate your risk for developing a certain disease. A person who undergoes a predictive genetic test is not a patient because there would be no need for medical care at the time that the genetic test is done. However, a predictive genetic test that shows a person has a gene mutation that could lead them to developing a certain genetic disease can help establish which early screening tests should be done. Some experts have argued that there should be a medical reason to carry out a predictive genetic test. Therefore, it has been stressed that the request for a test should be voluntary and come from a person who understands the implications of the test without any external pressure from family. Cytogenetic tests evaluate whole chromosomes from the nucleus of the cell for changes in number or structure. Cytogenetic testing is often the first tier of genetic testing for a number of clinical situations. These situations include assessment of a developmentally delayed child, evaluation of a cancerous tumour, or amniocentesis to detect chromosomal anomalies in a fetus. Prenatal testing for Down syndrome uses cytogenetic testing to identify an extra copy of all or part of chromosome 21.

ALL ANSWERS SHOULD BE THOROUGHLY RESEARCHED, IN ANY FORUM AND ESPECIALLY IN THIS ONE. – MANY ANSWERS ARE FLAWED.

It is extremely important to obtain an accurate diagnosis before trying to find a cure. Many diseases and conditions share common symptoms.

The information provided here should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions.

I add a link with details of this subject

http://www.accessdna.com/condition/
Medical_Genetic_Testing/242

Hope this helps
matador 89