Immune System: Natural defense mechanisms against infections and foreign materials.
Implant: Synthetic material or device that is inserted as treatment into the body, often permanently. Examples: radioactive seed implantation for prostate cancer; penile implants for erectile dysfunction.
Impotence: Inability to produce or maintain erection sufficient for intercourse.
Incision: Surgical cut.
Incontinence: Inability to control urination and urine flow.
Interstitial Radiation Therapy: Radioactive seed implantation therapy. Synonyms: Brachytherapy, seed implanatation.
Intramuscular: Within muscle.
Intravenous: Within a vein.
Intravenous Pyelogram (IVP): Imaging test to visualize the kidneys, ureters, bladder, and urethra by injecting a radio-opaque fluid intravenously. Synonym: Excretory urogram.