A complete blood count (CBC) is a procedure in which a sample of blood is drawn and checked for:

 

• The number of red blood cells, white blood cells, and platelets
• The amount of hemoglobin (the protein that carries oxygen) in the red blood cells
• The portion of the sample made up of red blood cells.

 

A peripheral blood smear is a procedure in which a sample of blood is checked for:

 

• Cells that look "hairy"
• The number and kinds of white blood cells
• The number of platelets
• Changes in the shape of blood cells.

 

A bone marrow biopsy is used to remove a small piece of bone and bone marrow by inserting a needle into the hipbone or breastbone. A pathologist will then view both the bone and bone marrow samples under a microscope to look for signs of cancer.

 

Immunophenotyping is a test in which the cells in a sample of blood or bone marrow are looked at under a microscope to check the pattern of proteins that are on the surface of the cells. Hairy cells have a certain pattern.

 

A computed tomography (CT) scan is a procedure that makes a series of detailed pictures of areas inside the body, taken from different angles. The pictures are made by a computer linked to an x-ray machine. A dye may be injected into a vein or swallowed to help the organs or tissues show up more clearly. This procedure is also called computerized tomography or computerized axial tomography (CAT). A CT scan of the abdomen may be done to check for swollen lymph nodes or a swollen spleen.