What is Brain Tumor

A brain tumor is an abnormal growth of cells within the brain or the central spinal canal that can be either benign (non-cancerous) or malignant (cancerous). Because the brain is encased in the rigid skull, any mass—regardless of its malignancy—can exert pressure on delicate tissues, potentially disrupting essential neurological functions.

What is a brain tumor and how does it affect the body?

A brain tumor occurs when cells grow uncontrollably, forming a mass that occupies space within the cranium. These growths affect the central nervous system by compressing healthy brain tissue, obstructing the flow of cerebrospinal fluid, or invading surrounding areas. Depending on its location, a brain tumor can impact cognitive function, motor skills, vision, hearing, and hormonal balance.

How are brain tumors classified?

Clinicians classify a brain tumor based on its origin and behavior. They are broadly categorized into two types:

• Primary tumors: These originate directly in the brain or spinal cord and rarely spread to other parts of the body.


• Secondary (metastatic) tumors: These are far more common and occur when cancer cells from elsewhere in the body, such as the lungs or breasts, travel to the brain.

Who is typically affected by a brain tumor?

The incidence of a brain tumor varies significantly by age and type. While they can occur at any age, certain subtypes are more prevalent in children, while others are more frequently diagnosed in older adults. According to the Central Brain Tumor Registry of the United States (CBTRUS), primary malignant brain tumors have an overall incidence rate of approximately 7.2 per 100,000 population. There is no single geographic or gender-based cause, though specific genetic syndromes can increase individual risk.

What differentiates a brain tumor from other conditions?

Unlike many other conditions, a brain tumor is defined by its "mass effect." Because the brain is trapped in a fixed-volume skull, symptoms often arise from the intracranial pressure caused by the tumor itself, rather than just the destruction of neurons. Distinguishing between a primary brain tumor and a metastatic lesion is the most critical step in determining an appropriate treatment plan.

Next steps

• Consult a neuro-oncologist or neurologist for a comprehensive diagnostic evaluation, including MRI or biopsy.


• Connect with the 56 members on DiseaseMaps.org to share experiences and find support within our community.


• Keep a detailed symptom diary to help your clinical team understand how the condition is affecting your daily life.

Medical disclaimer: This information is for educational purposes only and does not constitute professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions regarding a medical condition.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Brain Tumor overview.


• Central Brain Tumor Registry of the United States (CBTRUS) Statistical Reports.


• World Health Organization (WHO) Classification of Tumors of the Central Nervous System.


• American Brain Tumor Association (ABTA) resources.