# Can benign tumors become cancerous?

Canonical page: https://clinicsjo.com/en/faq/can-benign-tumors-become-cancerous
Language: en
Category: oncology
Publisher: ClinicsJo
Published: 2026-09-13T08:09:50.767Z
Content updated: 2026-09-13T08:09:50.767Z
Translation (ar): https://clinicsjo.com/ar/faq/can-benign-tumors-become-cancerous

Benign tumors are abnormal growths of cells in the body, but they are not cancerous by nature. Unlike malignant (cancerous) tumors, benign tumors do not spread to other parts of the body and do not invade surrounding tissues [\[1\]](<https://clinicsjo.com/en/faq/can-benign-tumors-become-cancerous#source-S1>). These tumors typically grow in one location only, and in most cases, they do not recur after being surgically removed [\[1\]](<https://clinicsjo.com/en/faq/can-benign-tumors-become-cancerous#source-S1>).

However, at times, benign tumors can pose a risk if they press on vital organs, such as the brain [\[1\]](<https://clinicsjo.com/en/faq/can-benign-tumors-become-cancerous#source-S1>). Although benign tumors are not classified as cancerous, there are certain types of tumors that can be benign or malignant, depending on their progression [\[3\]](<https://clinicsjo.com/en/faq/can-benign-tumors-become-cancerous#source-S3>). It is important to consult a physician to evaluate any mass or abnormal growth in the body to determine its nature and the necessity of follow-up or treatment.

## What is the nature of benign tumors?

Benign tumors consist of extra cells that form when the body does not need them, or when old cells do not die at the appropriate time [\[1\]](<https://clinicsjo.com/en/faq/can-benign-tumors-become-cancerous#source-S1>). These extra cells can divide without stopping and form a tumor [\[1\]](<https://clinicsjo.com/en/faq/can-benign-tumors-become-cancerous#source-S1>). For example, a lipoma is a common benign tumor made of fatty tissue under the skin, and it is usually non-cancerous [\[2\]](<https://clinicsjo.com/en/faq/can-benign-tumors-become-cancerous#source-S2>).

Benign tumors differ from malignant (cancer) tumors in several key aspects: benign tumors do not spread to other parts of the body, do not invade surrounding tissues, and usually have clear boundaries [\[1\]](<https://clinicsjo.com/en/faq/can-benign-tumors-become-cancerous#source-S1>). In contrast, malignant tumors can invade surrounding tissues and spread (metastasize) to other parts of the body [\[3\]](<https://clinicsjo.com/en/faq/can-benign-tumors-become-cancerous#source-S3>).

## When do benign tumors require follow-up or treatment?

Although benign tumors are not cancerous, some may require follow-up or treatment. The decision for treatment depends on several factors, including the tumor's location, size, growth rate, and the symptoms it causes [\[3\]](<https://clinicsjo.com/en/faq/can-benign-tumors-become-cancerous#source-S3>). If a benign tumor is pressing on a vital organ, such as the brain or spinal cord, it may cause serious symptoms and require surgical removal [\[1\]](<https://clinicsjo.com/en/faq/can-benign-tumors-become-cancerous#source-S1>).

For example, pituitary tumors are often benign, but they may secrete abnormally high levels of hormones, leading to neurological conditions such as Cushing's syndrome [\[3\]](<https://clinicsjo.com/en/faq/can-benign-tumors-become-cancerous#source-S3>). In these cases, treatment may be necessary to manage symptoms.

## Examples of benign tumors that may require follow-up

- **Benign brain and spinal cord tumors:** Although they do not spread, they can cause symptoms if they compress sensitive neural tissue. Symptoms may include headaches, seizures, vision or hearing problems, and changes in personality or behavior [\[3\]](<https://clinicsjo.com/en/faq/can-benign-tumors-become-cancerous#source-S3>).

- **Hemangiomas:** These are benign tumors that form in blood vessels. Although they usually do not spread, some may require follow-up if they cause functional or aesthetic problems [\[1\]](<https://clinicsjo.com/en/faq/can-benign-tumors-become-cancerous#source-S1>).

- **Adiposis dolorosa:** This condition is characterized by painful lipomas under the skin. The pain can be severe, especially if the tumors press on a nearby nerve, and may require follow-up for pain management [\[2\]](<https://clinicsjo.com/en/faq/can-benign-tumors-become-cancerous#source-S2>).

## Practical steps for follow-up and care

If you discover a mass or an abnormal growth on your body, it is essential to consult a doctor for evaluation. The doctor will review your medical and family history, perform physical and neurological examinations, and may order imaging tests such as magnetic resonance imaging (MRI) or computed tomography (CT) to diagnose the type of tumor [\[3\]](<https://clinicsjo.com/en/faq/can-benign-tumors-become-cancerous#source-S3>). In some cases, a biopsy may be needed to determine the nature of the tumor accurately [\[3\]](<https://clinicsjo.com/en/faq/can-benign-tumors-become-cancerous#source-S3>).

Remember that early diagnosis and regular follow-up can make a significant difference in managing any condition. For more information on this topic, you can visit [Benign Tumors: When are they just a lump and when do they need follow-up? (Arabic)](<https://clinicsjo.com/ar/articles/benign-tumors-when-to-monitor-when-to-act>)

## Medical references

- [Benign Tumors](<https://medlineplus.gov/benigntumors.html>)

- [Adiposis dolorosa: MedlinePlus Genetics](<https://medlineplus.gov/genetics/condition/adiposis-dolorosa/>)

- [Brain and Spinal Cord Tumors](<https://www.ninds.nih.gov/health-information/disorders/brain-and-spinal-cord-tumors>)

General health education; not a substitute for individualized clinical assessment.

Citation URL: https://clinicsjo.com/en/faq/can-benign-tumors-become-cancerous#answer