Lumps in the Armpit: Causes and When to Worry - Oncology

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There is a hard lump in the armpit?


Hello, doctor.
Seven months ago, I discovered a painless lump in my right armpit.
Later, I had a breast ultrasound, and the doctor said that no lumps were found on either side, attributing it to breast tissue.
However, I was still concerned and went to a larger obstetrics and gynecology clinic.
This time, they also didn't find anything, but the doctor examined thoroughly and mentioned a 0.3 cm lymph node, assuring me that there was no problem.
Just a few days ago, I woke up with pain in my other armpit, and upon examination, I found a painful lump.
So, I made an appointment.
This time, the doctor also didn't find anything on either side, but I can feel a small lump on both sides...
What could be the reason for this? Why did none of the three examinations detect it, but I can clearly feel a small lump (about 0.5 cm)? Could this be cancer? I'm very worried.

J, 20~29 year old female. Ask Date: 2023/02/04

Dr. Chen Sirong reply Oncology


J / 26 years old / Female.
Could this be cancer? I'm very worried.

A: 1.
Considering your age, breast cancer is quite rare at 26 years old.
2.
In terms of size, lymph nodes larger than 1 cm have a higher likelihood of being cancerous.
3.
Regarding the primary site, axillary lymph nodes in women are mostly associated with breast cancer; if there are no issues with the breast, it is more likely that your axillary lymph nodes are not cancerous.
4.
The doctor has confirmed that there are no problems.
4.1 You might be interpreting bone protrusions, tendons, etc., as lymph nodes.
4.2 The doctor mentioned that the 0.3 cm lymph node does exist, but the chance of it being malignant is low, and if the breast is normal, it is generally recommended to observe it for a period of time.
If it enlarges, surgical removal and biopsy can be considered.
Wishing you a happy Lantern Festival!

Reply Date: 2023/02/04

More Info


When it comes to lumps in the armpit, it’s understandable to feel concerned, especially when you notice changes or experience discomfort. Let’s break down the potential causes of these lumps and discuss when it might be necessary to seek further medical evaluation.


Common Causes of Lumps in the Armpit
1. Lymph Nodes: The armpit (axillary) region contains lymph nodes, which are part of the immune system. They can become enlarged due to infections, inflammation, or other conditions. A lump that is painful may indicate an infection or inflammation, while a painless lump could be a benign lymph node enlargement.

2. Infections: Conditions such as bacterial or viral infections can lead to swollen lymph nodes. For instance, a common cold or skin infection can cause lymph nodes to swell as they work to fight off the infection.

3. Cysts: Sebaceous cysts or other types of cysts can develop in the armpit area. These are usually benign and can feel like small lumps under the skin.

4. Lipomas: These are benign tumors made of fat tissue. They are generally soft, movable, and painless.

5. Breast Tissue: As noted in your ultrasound results, breast tissue can sometimes extend into the axillary region, which might be mistaken for a lump.

6. Malignant Conditions: While less common, lumps in the armpit can sometimes indicate more serious conditions, such as lymphoma or breast cancer. However, these are typically accompanied by other symptoms, such as weight loss, night sweats, or persistent pain.


When to Worry
Given your situation, here are some signs that warrant further medical evaluation:
- Changes in Size or Shape: If the lump increases in size or changes in shape, it’s important to have it reassessed.

- Persistent Pain: A lump that becomes painful or is associated with other symptoms (like fever or night sweats) should be evaluated.

- New Symptoms: If you experience unexplained weight loss, fatigue, or other systemic symptoms, it’s crucial to consult a healthcare provider.

- Duration: If the lump has been present for several weeks without improvement, further investigation may be warranted.


Diagnostic Steps
Since you’ve already undergone ultrasounds without definitive findings, consider the following steps:
1. Follow-Up Imaging: If the lump persists or changes, a follow-up ultrasound or MRI may provide more detailed information.

2. Biopsy: If there is still concern after imaging, a biopsy of the lump may be necessary to rule out malignancy.

3. Physical Examination: A thorough physical examination by a healthcare provider can help assess the characteristics of the lump and any associated symptoms.


Conclusion
While many lumps in the armpit are benign, it’s essential to stay vigilant and proactive about your health. Given your history of a painless lump and the recent development of a painful one, it’s advisable to follow up with your healthcare provider for further evaluation. They may recommend additional imaging or a biopsy to ensure that everything is normal. Remember, early detection and intervention are key in managing any potential health issues effectively.

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