Which of the following can be prevented by screening-
**Core Concept**
Screening tests are designed to detect diseases or conditions before symptoms appear, allowing for early intervention and potentially preventing or reducing the severity of the disease. This concept is crucial in preventive medicine, as it can lead to better health outcomes and reduced mortality rates.
**Why the Correct Answer is Right**
Screening tests can identify individuals at high risk of developing a particular disease, enabling the implementation of preventive measures, such as lifestyle modifications, medications, or surgery. For example, mammography can detect breast cancer at an early stage, allowing for prompt treatment and potentially preventing metastasis. Similarly, screening for hypertension can help identify individuals at risk of cardiovascular disease, enabling the initiation of lifestyle modifications and medications to prevent cardiovascular events.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify a disease or condition that can be prevented by screening. While some diseases may be asymptomatic, not all can be prevented by screening alone.
**Option B:** This option is incorrect because it implies that screening can cure a disease, rather than preventing it. Screening can identify diseases at an early stage, but treatment is still required to manage or cure the condition.
**Option C:** This option is incorrect because it suggests that all diseases can be prevented by screening. Unfortunately, not all diseases can be prevented by screening, and some may not have a screening test available.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that screening tests should be targeted to specific populations at high risk of developing a particular disease. For example, mammography is recommended for women aged 50-74 years, while colonoscopy is recommended for individuals with a family history of colorectal cancer.
**Correct Answer: C.