Hard Lumps Under the Armpit After Breast Cancer Treatment - Surgery

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There is a lump under my mother's armpit?


I would like to ask the doctor, my mother previously had breast cancer and has been treated successfully, but recently she has noticed a hard lump in her armpit that can only be felt when she raises her arm; it is not painful and cannot be felt when her arm is down.
I would like to know what could be the cause of this...
My mother has also had some massage therapy, and I wonder if it could be due to the massage being too vigorous, but it has not gone away for almost a week.

nv hai, 20~29 year old female. Ask Date: 2019/11/01

Dr. Li Zhonghuai reply Surgery


Hello! It is recommended to visit the breast surgery outpatient clinic.
If it has been a long time since your last follow-up examination, further tests are necessary.
This includes breast and abdominal ultrasound, mammography, chest X-ray, and tumor markers.
Take care! Changhua Hospital cares about you!

Reply Date: 2019/11/01

More Info


After breast cancer treatment, the appearance of hard lumps under the armpit can be concerning for patients and their families. In your mother's case, it is important to consider several factors that could contribute to this condition.

First, it is essential to understand that the presence of hard lumps in the axillary region (under the armpit) can be attributed to various causes. One common reason is the formation of scar tissue or fibrosis following surgery or radiation therapy. When breast cancer is treated, especially with procedures like mastectomy or lymph node dissection, the body undergoes significant changes. Scar tissue can develop as part of the healing process, leading to hard lumps that may be palpable, particularly when the arm is raised.

Another possibility is the presence of lymphadenopathy, which refers to the enlargement of lymph nodes. This can occur due to several reasons, including infection, inflammation, or even recurrence of cancer. In patients who have undergone treatment for breast cancer, it is crucial to monitor any new lumps or changes in the axillary area, as they could indicate a need for further evaluation.

Regarding your concern about the massage therapy your mother received, it is possible that vigorous manipulation could lead to temporary swelling or inflammation in the area. However, if the lump persists for more than a week without improvement, it is advisable to seek medical attention. A healthcare professional can perform a physical examination and may recommend imaging studies, such as an ultrasound, to assess the lump's characteristics and determine the appropriate course of action.

In summary, while hard lumps under the armpit after breast cancer treatment can be benign and related to scar tissue or lymph node changes, it is essential to monitor the situation closely. If the lump does not resolve or if there are any accompanying symptoms such as pain, redness, or fever, it is crucial to consult with a healthcare provider. They can provide a thorough evaluation and determine whether additional diagnostic tests or treatments are necessary.

In addition to seeking medical advice, it may be beneficial for your mother to engage in gentle exercises and stretches to improve lymphatic drainage and reduce any potential swelling. However, these should be done under the guidance of a healthcare professional, especially considering her history of breast cancer.

Overall, maintaining open communication with her healthcare team is vital for addressing any concerns and ensuring her ongoing health and well-being.

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