Dr. Smith is performing a liver mass biopsy today on a 13-ye…

Dr. Smith is performing a liver mass biopsy today on a 13-year-old female in the ultrasound department. He asks you to set up the room for the procedure. Dr. Smith specifically asks for the smallest biopsy needle available for the young patient. You go to the supply room and see a 12G, 14G, 20G, and 25G. Which gauge would be the best option for the adolescent patient?