Is a biopsy painful?
Biopsies are typically performed under local anesthesia to minimize pain. Learn about different biopsy types, what to expect, and post-procedure care.
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2,030 questions in the library
Tests and investigations
Understand symptoms, tests, treatments and everyday health. Explore detailed answers with references and practical next steps.
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21 resultsDoes a complete blood count (CBC) test require any special preparation?
Find out if a complete blood count (CBC) requires special preparation like fasting, what to expect during the test, and when further instructions are needed.
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What is the main difference between a PCR test and an antigen test?
Discover the key differences between PCR and antigen tests for COVID-19, including how they work, result accuracy, and when to choose each test.
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Is a CT scan painful?
A CT scan is a painless procedure using X-rays to create detailed images of the body. Learn how it works, the role of contrast dye, and what to expect.
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Which tests help evaluate forgetfulness and diagnose dementia?
Learn about the examinations and clinical assessments doctors use to diagnose forgetfulness and dementia, from physical exams to advanced brain scans.
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Do all types of diagnostic imaging use radiation?
Not all diagnostic imaging uses radiation. Learn the differences between X-rays, MRI, and ultrasound, and when each is appropriate for your care.
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What is a Complete Blood Count (CBC) test and what does it reveal about your health?
Learn about the Complete Blood Count (CBC) test, its key components, and what the results mean for your overall health, including detecting medical conditions.
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Is an MRI scan painful?
Learn whether an MRI scan is painful, how to prepare, and what to expect during the exam, including potential noise and available solutions.
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Is a nuclear medicine scan painful? And what can I expect during the procedure?
A nuclear scan is usually a safe, painless medical exam. Learn about the procedure, necessary preparations, safety, and radiation expectations in this guide.
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What is the Thyroid-Stimulating Hormone (TSH) test, and why is it considered the most important initial test for assessing thyroid function?
Learn about the TSH test, its role in diagnosing hypothyroidism or hyperthyroidism, and what the results mean for your thyroid health.
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Can I eat and drink before a comprehensive urinalysis?
Learn about fasting instructions for a comprehensive urinalysis, and how to ensure sample accuracy and safety according to approved medical recommendations.
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What is the antinuclear antibody (ANA) test and what does a positive result mean?
Understand the significance of the antinuclear antibody (ANA) test in diagnosing lupus, what a positive result implies, and subsequent medical steps.
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Do normal urinalysis results mean that I am not sick?
Normal urinalysis results do not rule out every disease. Learn how symptoms and other findings guide interpretation and follow-up care.
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Can medications affect the results of a Complete Blood Count (CBC) test?
Learn how medications impact your Complete Blood Count (CBC) test results and why disclosing all supplements to your doctor ensures accurate interpretation.
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What does it mean if one of my complete blood count (CBC) values is abnormal?
Understand what abnormal CBC values—such as red blood cells, white blood cells, or platelets—may indicate and what these changes could mean for your health.
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When does a doctor order calcitonin and thyroid antibody tests?
Learn why doctors order calcitonin tests to diagnose medullary thyroid cancer and antibody tests to identify autoimmune thyroid conditions like Hashimoto's.
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What is the contrast material (dye) used in MRI and why is it used?
Contrast material (gadolinium) is used in MRI to enhance image precision and improve diagnosis. Learn why it is used and when it is necessary for your scan.
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What is the difference between a nuclear scan, X-rays, and an MRI?
Learn the difference between nuclear scans, X-rays, and MRIs. Nuclear scans focus on organ function, while X-rays and MRIs show anatomical structure.
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What is CT scan contrast material (dye) and why is it used?
Contrast material is used in CT scans to enhance tissue and vessel clarity. Learn about the types, administration methods, and potential contraindications.
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What is the role of the Angiotensin-Converting Enzyme (ACE) test in diagnosing sarcoidosis?
The Angiotensin-Converting Enzyme (ACE) test is used as an adjunctive check for sarcoidosis. Learn about its importance and limitations in medical screening.
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Are there tests to detect the use of inhalants?
There is no single comprehensive lab test for inhalants. Clinical screening tools and physical symptom assessment are used to detect substance use risk.
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