Bone marrow biopsy
The removal of a sample of bone marrow and a small amount of bone (usually from the hip) through a large needle.
Two samples are taken.
The first is bone marrow by aspiration (suction with a syringe).
The second sample is a core biopsy to obtain bone marrow together with bone fibers.
After the needle is removed, this solid sample is pushed out of the needle with a wire.
Both samples are examined under a microscope to see the cells and architecture of the bone marrow