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This test measures the number of platelet cells in your blood. It can give your healthcare provider valuable information about how well your blood clots to stop bleeding, how well your bone marrow is working, and diseases that affect your platelet count.

Secondhand smoke is the smoke you're exposed to when someone nearby is smoking. It includes the smoke breathed out by the smoker. And it includes the smoke given off by the burning tobacco.

This test measures the amount of copper in your blood. Too little or too much copper can cause health problems.

A brain tumor starts when cells in the brain change and grow out of control. As they continue to grow, they form a mass of cells that becomes a tumor.

Bone marrow is the soft, spongy part inside bones. It makes most of the body’s blood cells. Aspiration and biopsy are procedures done to take a sample of bone marrow out of the body to exam. Find out why these procedures are done and how to prepare for them.

A bone marrow biopsy involves removing a small sample of the bone marrow inside your bones for testing. Read on to learn what to expect before, during, and after this procedure.

This test measures the amount of copper-containing protein in the blood. It can help diagnose copper disorders like Wilson disease.

Hemolytic anemia is a group of disorders in which the red blood cells are destroyed faster than the bone marrow can make them. Learn more about the causes, symptoms, diagnosis, and treatment.

A stem cell transplant uses young blood cells, called stem cells, to replace bone marrow that has been destroyed by cancer treatment. It is a complex treatment and can cause serious side effects. Here's what you need to know.

Chemotherapy is an important part of treatment for some types of bone cancers. But it may not be helpful for other types. Learn when chemotherapy is used and what you can expect.