Mobile Breast Lumps: What You Need to Know - Surgery

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Mobile breast mass


Hello, doctor.
I discovered a lump about 4 centimeters in size on the outer side of my left chest during high school.
It is painless and can be slightly moved.
The hospital examination indicated that it is likely benign, so I didn't pay much attention to it.
However, today while showering, I suddenly thought the lump had disappeared, but it seems to have moved deeper towards the center.
I'm concerned about whether this could be problematic since it hasn't moved for several years.
Thank you, doctor.

77, 20~29 year old female. Ask Date: 2022/11/11

Dr. Chen Bingze reply Surgery


Hello, tumors with such a high degree of mobility are more likely to be benign.
If you are concerned, it is advisable to visit a nearby physician for an evaluation.

Reply Date: 2022/11/11

More Info


When it comes to breast lumps, especially those that are mobile and have been assessed as benign, it's important to understand the nature of these findings and what they may indicate. Based on your description, you have a mobile lump in your left breast that was previously assessed as benign by a healthcare professional. The fact that it is movable and not painful is generally a reassuring sign, as many benign breast conditions, such as cysts or fibroadenomas, can present in this way.

However, the recent change in the position of the lump is understandably concerning. Breast lumps can change over time due to hormonal fluctuations, especially in younger individuals. The breast tissue is influenced by the menstrual cycle, and changes in breast density and lump mobility can occur. For instance, during the menstrual cycle, hormonal changes can lead to swelling or tenderness in breast tissue, which might affect the perception of lumps.

In your case, the lump moving from one location to another could be due to several factors. It might be that the lump was always mobile but was not easily felt in its previous position. Alternatively, it could be a different benign condition that has developed. Common benign breast conditions include:
1. Fibroadenomas: These are solid, non-cancerous lumps that are often movable and can vary in size. They are common in younger women and can sometimes change in size or position.

2. Cysts: These are fluid-filled sacs that can also be mobile. They may fluctuate in size with the menstrual cycle.

3. Lipomas: These are benign tumors made of fat tissue that can also be movable.

While the initial assessment indicated that the lump was benign, it is crucial to monitor any changes in size, shape, or mobility. If you notice any new symptoms, such as pain, changes in the skin over the lump, or any discharge from the nipple, it would be advisable to seek further evaluation.

Given that the lump has changed position, I recommend scheduling a follow-up appointment with your healthcare provider or a breast specialist. They may suggest imaging studies, such as an ultrasound or mammogram, to further evaluate the lump and ensure that it remains benign. Regular self-examinations and awareness of your breast health are important, and any significant changes should be reported to a healthcare professional.

In summary, while the mobile nature of the lump and its benign assessment are reassuring, the recent change in its position warrants further investigation. It is always better to err on the side of caution when it comes to breast health. Regular check-ups and open communication with your healthcare provider will help ensure that any potential issues are addressed promptly.

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