Armpit Lumps: Could They Be Lipomas?

Axillary mass

Hello doctor, I have noticed individual lumps measuring 0.2 cm (left) and 0.4 cm (right) under my armpit over the past six months.
They are not painful when pressed.
Could they be lipomas? Thank you.

Lu Yi, 20~29 year old female. Ask Date: 2015/09/21

Dr. Chen Sirong reply Oncology

Louis, 24 years old, has discovered individual lumps measuring 0.2 cm (left) and 0.4 cm (right) in the armpit over the past six months.
They are not painful when pressed.
1.
I am unsure if these are lipomas.
To determine the type of tumor, a physician would need to perform a physical examination and possibly a biopsy for further analysis.
2.
It seems that there has been little change over the past six months, suggesting they may be benign.
However, to identify the type of tumor, a consultation with a physician is necessary.
Thank you, Taoyuan Hospital, Chen Si-Rong.

Reply Date: 2015/09/21

More Info

When it comes to lumps in the armpit area, especially those that are small, painless, and mobile, they can often be benign conditions such as lipomas. Lipomas are soft, fatty tumors that are typically harmless and can occur anywhere in the body, including the armpits. They are usually slow-growing and can vary in size, often measuring anywhere from a few millimeters to several centimeters. The fact that you have noticed lumps measuring 0.2 cm on the left and 0.4 cm on the right, which do not cause any pain when pressed, aligns with the characteristics of lipomas.

However, while lipomas are the most common type of soft tissue tumor, it is essential to consider other possibilities as well. Other benign conditions that can present as lumps in the armpit include lymphadenopathy (swollen lymph nodes), cysts, or even dermatological conditions like hidradenitis suppurativa. Lymph nodes can become enlarged due to infections, inflammatory conditions, or other systemic issues, and they may also be painless. Cysts, which can be sebaceous or epidermoid, are also common and can feel like lumps under the skin.

Given that you have been monitoring these lumps for about six months without any changes in size or symptoms, it is likely that they are benign. However, it is always prudent to consult a healthcare professional for a proper evaluation. A physical examination is crucial, and in some cases, imaging studies such as an ultrasound may be recommended to assess the characteristics of the lumps further. If there is any concern about the nature of the lumps, a biopsy may be performed to definitively rule out any malignant processes.

In terms of management, if the lumps are confirmed to be lipomas and are not causing any discomfort or functional issues, treatment may not be necessary. Many individuals choose to leave lipomas untreated unless they become bothersome or for cosmetic reasons. Surgical removal is an option if desired, and it is typically a straightforward procedure.

In conclusion, while the lumps you have described could very well be lipomas, it is essential to have them evaluated by a healthcare professional to rule out other potential causes. Regular monitoring is also advisable, and any changes in size, shape, or associated symptoms should prompt a reevaluation. Remember, early detection and diagnosis are key to managing any health concerns effectively.

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