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Related Concept Videos

Skin Cancer01:30

Skin Cancer

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Skin cancer is a type of cancer that occurs when there is an abnormal growth of skin cells, usually triggered by damage to the DNA within the skin cells. It is primarily caused by exposure to ultraviolet (UV) radiation from the sun or artificial sources like tanning beds. Skin cancer is the most common type of cancer worldwide, and its incidence continues to rise.
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Sensory Functions of the Skin01:16

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The skin is the largest organ of the human body and plays a crucial role in our sensory perception. It contains a vast network of sensory receptors that contribute to the skin's protective function by perceiving physical, biological, and environmental cues and generating relevant responses.
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Skin Diseases and Disorders01:23

Skin Diseases and Disorders

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Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
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Role of Skin in Vitamin D Synthesis01:23

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The skin plays a crucial role in the synthesis of vitamin D, a vital nutrient for various physiological processes in the body. Vitamin D is unique because it can be synthesized in the skin through a series of chemical reactions triggered by exposure to ultraviolet B (UVB) radiation from sunlight.
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Accessory Structures of the Skin: Nails01:05

Accessory Structures of the Skin: Nails

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Nails are one of the important accessory structures of the skin. They are hard, protective structures that cover the dorsal surface of the distal phalanges of fingers and toes. Nails are composed of specialized keratinized cells and serve various functions, including protection, sensation, and manual dexterity.
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Changes in Skin Color: Clinical Perspectives01:14

Changes in Skin Color: Clinical Perspectives

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The first thing a clinician sees is the skin, so the examination of the skin should be part of any thorough physical examination. Most skin disorders are relatively benign, but a few, including melanomas, can be fatal if untreated. A couple of the more noticeable disorders, albinism and vitiligo, affect the appearance of the skin and its accessory organs.
Albinism
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Skin Biopsy for Diagnosing Discoid Lupus Erythematosus
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The tuberculin skin test

P Martin1

  • 1Department of Respiratory Medicine, Wellington Hospital.

The New Zealand Medical Journal
|August 10, 1994
PubMed
Summary
This summary is machine-generated.

The tuberculin skin test is a valuable diagnostic tool when standardized. Careful interpretation of available data can aid its use in vaccinated populations, like in New Zealand.

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Area of Science:

  • Immunology
  • Public Health
  • Diagnostic Medicine

Background:

  • The tuberculin skin test (TST) is a widely recognized method for diagnosing tuberculosis infection.
  • Standardization is crucial for accurate TST results.
  • Widespread BCG vaccination can complicate TST interpretation in certain populations.

Purpose of the Study:

  • To evaluate the utility of the tuberculin skin test as a diagnostic and screening tool.
  • To explore methods for interpreting TST results in populations with high BCG vaccination rates.

Main Methods:

  • Review of existing data and literature on tuberculin skin test standardization.
  • Analysis of TST performance in both vaccinated and unvaccinated populations.
  • Examination of strategies for interpreting TST results in the context of widespread vaccination.

Main Results:

  • A carefully standardized tuberculin skin test is confirmed as a useful diagnostic and screening tool.
  • While easier to apply in unvaccinated groups, existing data can support TST interpretation in vaccinated populations.
  • Specific considerations are needed for accurate TST use in regions like New Zealand with high BCG coverage.

Conclusions:

  • The tuberculin skin test remains a relevant tool for tuberculosis diagnosis and screening.
  • Effective TST interpretation in vaccinated populations is achievable with careful consideration of available data.
  • Public health strategies should account for vaccination status when implementing TST programs.