• Anoscopy

    Examination of the anus using an endoscope.

  • Antibodies

    Proteins produced by the immune system to defend against viruses, bacteria and other foreign bodies.

  • Anticoagulants

    Blood-thinning medication that prevents the development of blood clots.

  • Antigen

    Substances that the immune system recognises and neutralises by producing antibodies that bind to them.

  • Aorta

    The body’s main artery.

  • Aortic aneurysm

    Bulge or widening in the body’s main artery.

  • Aortic dissection

    Bleeding through a tear in the innermost layer of the aorta.

  • Appendicitis

    Inflammation of the appendix.

  • Application

    Medical term for giving or administering, e.g. application of a medication.

  • Argon plasma coagulation

    Superficial coagulation using argon gas.

  • Arterialisation

    Arterial flow in the venous system.