A sample of tissue for culture is obtained by liver biopsy . The sample is placed in appropriate media in the laboratory and observed for growth of mycobacteria . You must sign an informed consent form giving permission for the liver biopsy . The physical and psychological preparation you can provide for this or any test or procedure depends on your child's age, interests, previous experience, and level of trust.
Local anesthetic is injected into the skin over the area to be biopsied.
A needle is inserted through the skin between the lower ribs into the liver and tissue is withdrawn. After the biopsy , a small pillow or sand bag is placed over the biopsy site for several hours to prevent bleeding . No growth is normal.