Treatment of diseases at their earlier stages should be more effective than treatment begun after the development of symptoms. For example, cancer of the uterine cervix develops slowly, taking more than a decade for the cancer cells to progress to a phase of invasiveness. During this preinvasive stage, the cancer is usually asymptomatic but can be detected by screening using the Pap smear.
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The screening procedure itself does not diagnose the illness. Those who have a positive result from the screening test will need further evaluation with subsequent diagnostic tests or procedures. The table below shows ranges for total cholesterol, LDL (“bad”) cholesterol, and HDL (“good”) cholesterol levels after 9 to 12 hours of fasting. High blood cholesterol is a risk factor for coronary heart disease. For many blood substances, the normal range is the range of levels seen in 95 percent of healthy people in a certain group.
If pseudodisease conditions such as cancers are treated, the patient may be considered “cured” because he or she died from a cause other than cancer. But designating such outcomes as “cures” is erroneous because the cancer—even ifuntreated—would not have killed the patient before the time that he or she actually died of other causes.
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- A one-off screening will only pick up health conditions that are present at the time of screening.
- Hence, it is important for you to go for regular screening tests at the recommended frequency.
- Regular screening helps genital herpes treatment to detect conditions that may develop after the previous screening.
Treatment is more effective during this stage than when the cancer has become invasive. On the other hand, lung cancer has a poor prognosis regardless of the stage at which treatment is initiated. Early diagnosis and treatment appear to prolong life little more than therapy after symptoms have developed.
Screening to detect early stage lung cancer using currently available techniques would not be beneficial. Screening refers to the application of a medical procedure or test to people who as yet have no symptoms of a particular disease, for the purpose of determining their likelihood of having the disease.
For many tests, normal ranges vary depending on your age, gender, race, and other factors. Blood tests for kidney function measure levels of blood urea nitrogen and creatinine (kre-AT-ih-neen). Both of these are waste products that the kidneys filter out of the body.
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Type I pseudodisease refers to conditions that might not progress to symptomatic disease and may even regress. Type II pseudodisease is an indolent, slowly progressive disease found in conditions with a long detectable preclinical phase.