Interstitial radiation


Radiation therapy in which a radioactive material is placed directly into a tumor.

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  • Interstitial radiation therapy

    Radiation treatment given by placing radioactive material directly into the target, often a tumor. For example, in treating prostate cancer, radioactive seeds are implanted in the prostate gland. The seeds might be titanium-encased pellets containing the radioisotope iodine-125. Interstitial radiation therapy is also called seed implantation or brachytherapy (brachys being Greek for short).

  • Intertrigo

    A superficial skin disorder involving any area of the body where opposing skin surfaces may touch and rub, such as the creases of the neck, the skin folds of the groin, axilla (armpit) and breasts (especially if large and pendulous) and between the toes. Intertrigo is characterized by skin reddening (erythema), maceration (saturated with moisture), […]

  • Interval malignancy

    In mammography, a malignancy that becomes evident during the period between annual screening mammograms. The finding of an interval malignancy indicates that it either went undetected on the prior breast imaging scan or that it developed during the interval since that last scan.

  • Intervention

    The act of intervening, interfering or interceding with the intent of modifying the outcome. In medicine, an intervention is usually undertaken to help treat or cure a condition. For example, early intervention may help children with autism to speak. “Acupuncture as a therapeutic intervention is widely practiced in the United States,” according to the National […]

  • Intervening sequence

    Part of a gene that is initially transcribed from the DNA into the primary RNA transcript but then is excised (removed) from it when the so-called exons sequences on either side of it are spliced together. Intervening sequences, which are also called introns, are genetic sequences that intervene between the exons. The DNA of a […]


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