Category: G

  • Great cardiac vein

    A large vein on the anterior surface of the heart running in the coronary groove. It drains the same area supplied by the left coronary artery and empties into the coronary sinus on the back surface of the heart.  

  • Genetic variability

    The range of minor alterations present in a genome, such as the number of diverse alleles of a specific gene that are found as a result of small mutations in the DNA of a species.  

  • Granular vaginitis

    Vaginitis with cellular infiltration and enlargement of papillae.  

  • Grayscale ultrasonography

    Use of a television scan technique to process the strength of ultrasound echoes with the strongest being registered as white and the weakest as different shades of gray.  

  • Growth discordant twins

    The unequal growth of twins while in utero. The smaller twin is at greater risk of having congenital anomalies than is the normal birth-weight twin.  

  • Granulosa-theca cell tumor

    An estrogen secreting tumor of the ovary made up of either granulosa or theca cells.  

  • Granulosa cell tumor

    An estrin-secreting neoplasm of the granulosa cells of the ovary.  

  • Giant cell tumor of bone

    A benign or malignant tumor of bone in which the cells are multinucleated and surrounded by cellular spindle cell stroma.  

  • Giant cell tumor

    A malignant or benign bone tumor that probably arises from connective tissue of the bone marrow. Histologically, it contains a vascular reticulum of stromal cells and multinucleated giant cells. A tumor located on the jaw, also known as an epulis. A tumor that arises at the end of long bones, leading to the thinning of…

  • Gamma glutamyl transferase

    An enzyme present in the liver and biliary tree that is used to diagnose liver, gallbladder, and pancreatic diseases. Elevated levels of GGT are often found in people who use drugs (such as alcohol) that are metabolized by the liver.