Articles

  • Test

    X-ray

    X-rays are a form of ionizing radiation that can penetrate the body to form an image on film. Structures that are dense (such as bone) will appear white, air will be black, and other structures will be shades of gray depending on density. X-rays can provide information about obstructions, tumors, and other diseases, especially when coupled with the use of barium and air contrast within the bowel.

    X-rays are a type of electromagnetic radiation, just like visible light. An x-ray machine sends individual x-ray particles through the body. The images are...

  • Test

    X-ray - skeleton

    X-rays are a form of ionizing radiation that can penetrate the body to form an image on film. Structures that are dense (such as bone) will appear white, air will be black, and other structures will be shades of gray depending on density. X-rays can provide information about obstructions, tumors, and other diseases, especially when coupled with the use of barium and air contrast within the bowel.

    A skeletal x-ray is an imaging test used to look at the bones. It is used to detect fractures, tumors, or conditions that cause wearing away (degeneration)...

  • Disease

    Xanthoma

    Xanthomas are firm, raised waxy-appearing papules (bumps) which may occur on the trunk, arms, and legs. The lesions may be skin-colored, pink or even yellow. The presence of this type of skin lesion may be associated with abnormal levels of lipids (fats) in the blood.

    Xanthoma is a skin condition in which certain fats build up under the surface of the skin.

  • Disease

    Xeroderma pigmentosum

    Humans typically have 46 chromosomes. There are a total of 23 pairs of chromosomes or 46 total chromosomes. Chromosomes are made up of long strands of DNA which contain all the body's genes.

    Xeroderma pigmentosum is a rare condition passed down through families in which the skin and tissue covering the eye are extremely sensitive to ultraviolet...

  • Disease

    Xerosis

    Xerosis - close-up: Xerosis refers to abnormally dry skin or membranes, such as those found in the mouth or the conjunctiva of the eye. This picture shows a close-up of xerotic skin. Note the dry and scaly appearance.

    Xerosis is an abnormal dryness of the skin or mucus membranes.