Leukaemia (cell type not specified)
Also known as: Leukaemia, unspecified
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In short
Leukemia is a term for cancers of the blood cells that start in blood-forming tissues such as the bone marrow. When leukemia occurs, the bone marrow makes large numbers of abnormal cells, most often white blood cells, which build up and crowd out healthy blood cells. The type of leukemia depends on whether the affected blood cell is a lymphocyte or a myeloid cell, and whether it grows quickly or slowly. Symptoms of leukemia can include feeling tired, fever or night sweats, easy bruising or bleeding, weight loss or loss of appetite, and petechiae.
Source: MedlinePlus, National Library of Medicine.
AI-generated summary of the sources cited on this page, checked automatically against them. Not reviewed by a clinician; not medical advice.
Codes
Description
What is leukemia?
Leukemia is a term for cancers of the blood cells. Leukemia starts in blood-forming tissues such as the bone marrow. Your bone marrow makes the cells which will develop into white blood cells, red blood cells, and platelets. Each type of cell has a different job:
- White blood cells help your body fight infection
- Red blood cells deliver oxygen from your lungs to your tissues and organs
- Platelets help form clots to stop bleeding
When you have leukemia, your bone marrow makes large numbers of abnormal cells. This problem most often happens with white blood cells. These abnormal cells build up in your bone marrow and blood. They crowd out the healthy blood cells and make it hard for your cells and blood to do their work.
What are the types of leukemia?
There are different types of leukemia. Which type of leukemia you have depends on the type of blood cell that becomes cancer and whether it grows quickly or slowly.
The type of blood cell could be:
- Lymphocytes, a type of white blood cell
- Myeloid cells, immature cells that become white blood cells, red blood cells, or platelets
The different types can grow quickly or slowly:
- Acute leukemia is fast growing. It usually gets worse quickly if it's not treated.
- Chronic leukemia is slow growing. It usually gets worse over a longer period of time.
The main types of leukemia are:
- Acute lymphocytic leukemia (ALL), which is the most common type of cancer in children. It can also affect adults.
- Acute myeloid leukemia (AML), which is more common in older adults but can also affect children
- Chronic lymphocytic leukemia (CLL), which is one of the most common types of leukemia in adults. It often occurs during or after middle age.
- Chronic myeloid leukemia (CML), which usually occurs in adults during or after middle age
What causes leukemia?
Leukemia happens when there are changes in the genetic material (DNA) in bone marrow cells. The cause of these genetic changes is unknown.
Who is at risk for leukemia?
For the specific types, there are different factors which can raise your risk of getting that type. Overall, your risk of leukemia goes up as you age. It is most common over age 60.
What are the symptoms of leukemia?
Some of the symptoms of leukemia may include:
- Feeling tired
- Fever or night sweats
- Easy bruising or bleeding
- Weight loss or loss of appetite
- Petechiae, which are tiny red dots under the skin. They are caused by bleeding.
Other leukemia symptoms can be different from type to type. Chromic leukemia may not cause symptoms at first.
How is leukemia diagnosed?
Your health care provider may use many tools to diagnose leukemia:
- A physical exam
- A medical history
- Blood tests, such as a complete blood count (CBC)
- Bone marrow tests. There are two main types - bone marrow aspiration and bone marrow biopsy. Both tests involve removing a sample of bone marrow and bone. The samples are sent to a lab for testing.
- Genetic tests to look for gene and chromosome changes
Once the provider makes a diagnosis, there may be additional tests to see whether the cancer has spread. These include imaging tests and a lumbar puncture, which is a procedure to collect and test cerebrospinal fluid (CSF).
What are the treatments for leukemia?
The treatments for leukemia depend on which type you have, how severe the leukemia is, your age, your overall health, and other factors. Some possible treatments might include:
- Chemotherapy
- Radiation therapy
- Chemotherapy with stem cell transplant
- Targeted therapy, which uses drugs or other substances that attack specific cancer cells with less harm to normal cells
NIH: National Cancer Institute
Next to it in ICD-10
- C92Myeloid leukaemia
- C93Myeloid leukaemia
- C94Neoplasms of haematopoietic or lymphoid tissues, unspecified
- C96Other cancers of lymphoid and blood-forming tissue
- D00Carcinoma in situ of the mouth, oesophagus and stomach
- D03Melanoma in situ neoplasms, unspecified site
Neighbouring codes in the classification, not a medical link.
External resources
Questions
What is the ICD-10 code for Leukaemia (cell type not specified)?
C95 (WHO, International Classification of Diseases, 10th Revision).
What is the ICD-11 code for Leukaemia (cell type not specified)?
2B33.4: Leukaemia, unspecified (WHO, ICD-11 for Mortality and Morbidity Statistics).
Sources and attribution
- ICD-11 for Mortality and Morbidity Statistics, © World Health Organization, licensed under CC BY-ND 3.0 IGO.
- Names other than the official source titles: Anpheros translations and plain-language names, made with AI assistance and checked automatically; the source names are in English.
- Source: MedlinePlus, National Library of Medicine.
- ICD-10 codes and titles © World Health Organization. Source: WHO, International Classification of Diseases, 10th Revision (2019).
Anpheros Search catalog 2026.10.5, published 17 October 2026. About the data →
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