• Hyperthyrosis

    Overactive thyroid gland.

  • Hypothalamus

    Part of the diencephalon (interbrain) and the main regulator of the hormonal system.

  • Hypothyrosis

    Underactive thyroid gland.

  • Hysterectomy

    Surgical removal of the womb.

  • ICD

    Implantable cardioverter defibrillator. The ICD is a device that emits an electric shock to stop sudden ventricular fibrillation.

  • Idiopathic scoliosis

    Scoliosis without any identifiable cause.

  • Ileum

    Part of the small intestine.

  • Iliofemoral (Smith-Petersen) approach

    The joint is accessed through an incision along the ilium bone and over the hip.

  • Ilioinguinal (Letournel) approach

    The joint is accessed through an incision along the ilium bone and the inguinal ligament.

  • Immune system

    The body’s own defence system against foreign invaders like bacteria or viruses.

  • Immunoregulatory checkpoints

    Protein molecules on the surface of T cells that are activated by signal molecules. Once activated, the immunoregulatory checkpoints inhibit the T cells.