a Hard Lump in the Armpit: Possible Causes and Concerns

Q: a Hard Lump in the Armpit: Possible Causes and Concerns

Hello： Please make an appointment with a general surgeon as soon as possible to see if a biopsy of the axillary lymph nodes is necessary. <br>Thank you.

There is a hard lump (approximately 2 cm) in the armpit?

There is a hard lump in the armpit (approximately 2.5 cm) that has grown significantly over the past two weeks.
It does not hurt, feels firm to the touch, is visibly protruding, and there is no redness or swelling.
What could this possibly be? Thank you, doctor.

1234, 20~29 year old female. Ask Date: 2021/02/09

Dr. Chen Yunfang reply Oncology

Hello: Please make an appointment with a general surgeon as soon as possible to see if a biopsy of the axillary lymph nodes is necessary.
Thank you.

Reply Date: 2021/02/09

More Info

When you discover a hard lump in your armpit that has grown in size over a couple of weeks, it can understandably cause concern. There are several potential causes for such a lump, and while many are benign, it is essential to consider the possibilities and seek medical advice for proper evaluation.

1. Lymphadenopathy: One of the most common causes of a lump in the armpit is swollen lymph nodes. Lymph nodes can enlarge due to infections (such as viral or bacterial infections), inflammatory conditions, or malignancies. If the lump is firm and non-tender, it could indicate a chronic infection or even a more serious condition like lymphoma or metastatic cancer.

2. Lipoma: A lipoma is a benign tumor made of fat tissue. They are usually soft, movable, and painless. However, they can sometimes feel firmer and may grow larger over time. Lipomas are generally harmless and do not require treatment unless they cause discomfort or cosmetic concerns.

3. Cysts: Sebaceous cysts or epidermoid cysts can develop in the armpit area. These are usually benign and filled with a thick, oily substance. They can feel firm and may become inflamed or infected, leading to pain and redness. If the cyst is not causing any symptoms, it may not require treatment.

4. Fibromas or Other Benign Tumors: Other types of benign tumors, such as fibromas, can also present as hard lumps. These are usually not a cause for concern unless they grow significantly or cause discomfort.

5. Breast-Related Issues: In women, lumps in the armpit can sometimes be related to breast tissue, especially if there is a history of breast conditions. Conditions like breast cancer can sometimes present with lymph node involvement in the axillary region.

6. Infections: Certain infections, such as abscesses or skin infections, can lead to localized swelling and lumps. If the lump becomes painful, red, or warm, it may indicate an infection that requires treatment.

Given that the lump has grown in size over two weeks and is firm but not painful, it is crucial to consult a healthcare professional for a thorough evaluation. A doctor may perform a physical examination and may recommend imaging studies, such as an ultrasound or CT scan, to assess the lump's characteristics. In some cases, a biopsy may be necessary to determine the nature of the lump, especially if there is any suspicion of malignancy.

In summary, while there are several benign explanations for a hard lump in the armpit, the change in size and firmness warrants further investigation. Early diagnosis and treatment are essential, especially if the lump is related to a more serious condition. Therefore, I recommend scheduling an appointment with your healthcare provider to discuss your symptoms and undergo any necessary tests.

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