Key Takeaway

An abnormal growth does not automatically mean cancer. Tumors can be benign or malignant, and other conditions can also cause lumps or masses. Professional evaluation and appropriate testing are important for understanding what a growth represents and determining the next steps.

Hearing the word “growth” during a medical appointment can naturally raise questions. Not every abnormal growth is cancer, and not every growth behaves in the same way. Some are harmless and may only require observation, while others may need further testing or treatment.

Understanding what is a tumor can be a useful first step in making sense of these findings. A tumor is an abnormal mass of tissue that develops when cells grow and divide more than they should or fail to die when they normally would. Tumors can be benign, meaning they are not cancerous, or malignant, meaning they are cancerous.

What Is an Abnormal Growth?

The human body constantly replaces old or damaged cells with new ones. This process is normally controlled by signals that regulate when cells should grow, divide, and die.

When these controls change, cells can multiply abnormally and form a mass or growth.

A growth may develop in many parts of the body, including the skin, organs, bones, muscles, or other tissues. Its location, size, appearance, and behavior can all help healthcare professionals determine what additional evaluation may be needed.

Benign Tumors

A benign tumor is not cancerous. Although benign tumors can grow, they generally do not invade nearby tissues or spread to distant parts of the body.

Some benign tumors cause no symptoms and are discovered incidentally during imaging or another medical examination. Others can cause problems if they become large enough to press against nearby organs, nerves, blood vessels, or other structures.

Treatment depends on the type, location, size, symptoms, and potential complications. In some cases, monitoring may be appropriate. In others, removal may be recommended.

Malignant Tumors

Malignant tumors are cancerous. Cancer cells can invade surrounding tissues and, in some cases, travel through the blood or lymphatic system to other parts of the body.

This process is known as metastasis.

Different cancers behave differently. Some grow slowly, while others can progress more quickly. This is why identifying the specific type of cancer is important before determining an appropriate treatment approach.

Not Every Lump Is a Tumor

A lump or swelling does not automatically mean that a tumor is present.

Other causes can include:

• Cysts

• Infections

• Inflammation

• Swollen lymph nodes

• Scar tissue

• Injuries

• Benign tissue changes

Because many conditions can produce similar physical findings, it is not possible to determine the cause of a growth based on appearance alone.

How Are Abnormal Growths Evaluated?

A healthcare professional may begin with a physical examination and medical history. Depending on the location and characteristics of the growth, additional testing may be recommended.

Imaging techniques such as ultrasound, CT scans, or MRI can provide information about the size and location of a mass. In some cases, a biopsy is needed to examine cells or tissue under a microscope.

Laboratory testing may also be used depending on the suspected condition.

What Does a Biopsy Tell You?

A biopsy involves removing a sample of tissue so that it can be examined by a pathologist.

The results can help determine whether abnormal cells are present and, when cancer is identified, provide information about the type and characteristics of the tumor.

A biopsy is not required for every abnormal growth. The appropriate evaluation depends on the specific situation.

Signs That May Need Medical Evaluation

Many abnormal growths do not cause symptoms. However, it is worth discussing a new or changing lump with a healthcare professional, particularly if it:

• Continues to grow

• Becomes painful

• Changes in appearance

• Feels unusually firm

• Causes unexplained bleeding

• Interferes with nearby body functions

• Occurs alongside unexplained weight loss, persistent fatigue, or other concerning symptoms

These signs do not necessarily indicate cancer. They simply provide reasons to seek professional evaluation.

Why Diagnosis Matters

The word “tumor” describes an abnormal mass, but it does not by itself explain whether the growth is benign or malignant.

Healthcare professionals may need information from imaging, laboratory testing, pathology, and other evaluations before reaching a diagnosis.

Once the specific condition is identified, treatment or monitoring can be discussed based on the individual's circumstances.

Clinical Research for Solid Tumors

Cancer research continues to investigate potential treatments for different types of solid tumors. Clinical trials may study investigational medicines, combinations of treatments, or other approaches for people who meet specific eligibility requirements.

If you or someone you know has been diagnosed with a solid tumor and is interested in learning about research opportunities, you can explore eligibility information and enroll in a solid tumor clinical trial through NHO Revive Research.