Brain cancer
Also known as: Primary neoplasm of brain of unknown or unspecified type
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In short
A malignant brain tumor is a growth of abnormal cells in the tissues of the brain that contains cancer cells that grow quickly. These tumors can be primary, starting in the brain, or metastatic, starting elsewhere in the body and moving to the brain. Common symptoms include headaches, nausea, vomiting, seizures, and changes in mood, behavior, balance, or the ability to talk, hear, or see. Diagnosis is performed through a neurologic exam and tests such as an MRI, CT scan, and biopsy, while treatment options include surgery, radiation, chemotherapy, targeted therapy, or watchful waiting.
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
A brain tumor is a growth of abnormal cells in the tissues of the brain. Brain tumors can be benign, with no cancer cells, or malignant, with cancer cells that grow quickly. Some are primary brain tumors, which start in the brain. Others are metastatic, and they start somewhere else in the body and move to the brain.
Brain tumors can cause many symptoms. Some of the most common are:
- Headaches, often in the morning
- Nausea and vomiting
- Changes in your ability to talk, hear, or see
- Problems with balance or walking
- Problems with thinking or memory
- Feeling weak or sleepy
- Changes in your mood or behavior
- Seizures
Doctors diagnose brain tumors by doing a neurologic exam and tests including an MRI, CT scan, and biopsy. Treatment options include watchful waiting, surgery, radiation therapy, chemotherapy, and targeted therapy. Targeted therapy uses drugs or other substances that attack cancer cells with less harm to normal cells. Many people get a combination of treatments.
NIH: National Cancer Institute
Next to it in ICD-10
- C67Bladder cancer
- C68Cancer of other urinary organs
- C69Eye cancer
- C73Thyroid cancer
- C74Adrenal gland cancer
- C81Hodgkin Lymphoma
Neighbouring codes in the classification, not a medical link.
External resources
Questions
What is the ICD-10 code for Brain cancer?
C71 (WHO, International Classification of Diseases, 10th Revision).
What is the ICD-11 code for Brain cancer?
2A00.5: Primary neoplasm of brain of unknown or unspecified type (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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