Lumps Under the Armpit During Pregnancy: Causes and Concerns - Obstetrics and Gynecology

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During pregnancy, many women experience various physical changes, including the development of lumps or masses in different areas of the body, including under the armpits. The presence of a lump under the armpit, especially during pregnancy, can be concerning, but it is essential to understand the potential causes and implications.

Firstly, the lump you described, which is about the size of a soybean and is not painful, could be attributed to several benign conditions. One common cause is the enlargement of lymph nodes, which can occur due to hormonal changes during pregnancy. The body undergoes significant hormonal fluctuations, particularly with increased levels of estrogen and progesterone, which can lead to changes in breast and lymphatic tissue. This can result in the swelling of lymph nodes, which may present as a lump under the armpit.

Another possibility is the development of a fibroadenoma, which is a benign tumor made up of glandular and connective tissue. Fibroadenomas are common in women of reproductive age and can be influenced by hormonal changes. They are typically painless and can vary in size. It is important to note that while fibroadenomas are benign, they should be monitored, especially during pregnancy, as hormonal changes can sometimes cause them to grow.

Ultrasound is an effective imaging modality for evaluating breast and axillary lumps. It can help differentiate between solid masses (like fibroadenomas) and cystic structures (fluid-filled sacs). If the lump is solid, further evaluation may be warranted, including a biopsy, to rule out any malignant processes. However, it is crucial to discuss the timing of any procedures with your healthcare provider, especially during pregnancy, as certain interventions may carry risks.

If the lump were to be a tumor, the concern during pregnancy would primarily revolve around the type of tumor and its potential impact on both the mother and the fetus. Most benign tumors do not pose a significant risk, but if there is any suspicion of malignancy, your healthcare provider may recommend a careful approach to management, which could include monitoring or surgical intervention after delivery, depending on the situation.

In summary, while the lump under your armpit could be related to normal physiological changes during pregnancy, it is essential to have it evaluated by a healthcare professional. They may recommend an ultrasound to assess the lump further and determine the appropriate course of action. If it is a benign condition, there may be no need for immediate intervention, but if there are any concerns about malignancy, your healthcare provider will guide you on the best management plan that considers both your health and the safety of your baby. Always prioritize open communication with your healthcare team regarding any changes you notice during your pregnancy, as they can provide personalized advice and reassurance.