The removal of an example of bone tissue marrow and handful of bone through a big needle. Two samples are taken. The first is bone tissue marrow by aspiration (suction with a syringe). The second is a core biopsy to obtain bone marrow and bone materials. Following the needle is taken away, this solid test is pressed out of the needle with a wire. Both samples tend to be examined under a microscope to examine the cells as well as the architecture associated with bone marrow.