In-depth

Acute lymphocytic leukemia

Acute lymphocytic leukemia is a type of leukemia that affects immature white blood cells. It's the most common cancer in children and adolescents.

Acute myelogenous leukemia (AML)

Acute myelogenous leukemia (AML), a form of cancer that affects the blood cells, is the most common type of leukemia.

Aplastic anemia

Aplastic anemia occurs when your bone marrow stops producing enough new blood cells. It's a serious problem, but treatments are available.

Chronic lymphocytic leukemia

Chronic lymphocytic leukemia is a cancer of the blood and bone marrow. Unlike other cancers, this form of leukemia doesn't always initially require treatment.

Chronic myelogenous leukemia

Chronic myelogenous leukemia (CML) is a rare type of blood cancer. New treatments may be improving the prognosis for many people with CML.

Enlarged spleen

An enlarged spleen is usually a sign of an underlying problem. Treatment varies, depending on what's causing the enlargement.

Essential thrombocythemia

Essential thrombocythemia is an uncommon blood disorder in which your body makes too many platelets, which can cause abnormal blood clotting or bleeding.

Hodgkin's lymphoma

Monoclonal gammopathy of undetermined significance

Monoclonal gammopathy of undetermined significance often isn't serious, but it can increase your risk of certain diseases, including some types of cancer.

Myelodysplastic syndromes

Myelofibrosis

In myelofibrosis, healthy bone marrow is replaced with scar tissue, leading to severe anemia and fatigue.

Neuroblastoma

Neuroblastoma most commonly affects children age 5 and younger. It's the most common form of cancer in babies.

Polycythemia vera

Polycythemia vera is a rare blood disorder in which a person's bone marrow makes too many blood cells.

Thrombocytosis

Thrombocytosis is a disorder in which your body makes too many platelets. Treatment depends on the underlying cause.

Nov. 27, 2014