Axillary Lumps: Causes, Concerns, and Next Steps - Breast and Thyroid

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Hello! Thank you for reaching out with your concerns regarding the lump in your axilla (armpit) and the associated symptoms. It’s understandable to feel anxious when dealing with unexplained lumps, especially when they change in size and are accompanied by other symptoms. Let’s address your questions and provide some insights into what you might be experiencing.

1. Sudden Appearance of Accessory Breast Tissue (Supernumerary Breast Tissue): It is indeed possible for accessory breast tissue, or supernumerary breast tissue, to appear suddenly. This condition can manifest as a lump in the axillary region, and while it is often present from birth, it can become more noticeable due to hormonal changes, such as those that occur during your menstrual cycle. The lump may fluctuate in size due to hormonal influences, which could explain why you notice it becoming more prominent before your period.

2. Ultrasound Appearance of Accessory Breast Tissue: On ultrasound, accessory breast tissue may appear as a solid mass similar to breast tissue, but it can also present as a more complex structure depending on its composition. If the ultrasound did not show any abnormalities in the axillary region, it could mean that the tissue is not typical breast tissue or that it is not causing any significant changes that would be detectable at that time. Sometimes, accessory breast tissue can be mistaken for lymph nodes or other structures, particularly if it is not well-formed.

3. Relationship Between Breast Pain and Axillary Lump: The breast pain you are experiencing, particularly localized to the nipple, may or may not be related to the lump in your axilla. Hormonal fluctuations can cause breast tenderness and changes in breast tissue, which might also affect nearby structures. However, it’s essential to discuss these symptoms with your healthcare provider, as they can help determine if there is a connection or if they are separate issues.

4. Characteristics of Accessory Breast Tissue: Accessory breast tissue can feel like a lump or mass, and its texture can vary. It may feel firm or soft, and its shape can be irregular or oval, similar to a typical breast lump. The fact that you can pinch it and that it feels distinct suggests that it is likely a solid mass rather than fluid-filled cystic tissue.

Given your ongoing concerns and the changes you’ve observed, I recommend the following steps:
- Follow-Up with Your Healthcare Provider: Since the lump has been present for several months and has changed in size, it’s crucial to have a thorough evaluation. Request a follow-up ultrasound specifically targeting the axillary area, and discuss your symptoms in detail with your physician. They may consider additional imaging or even a biopsy if they deem it necessary.

- Monitor Changes: Keep track of any changes in the lump’s size, shape, or associated symptoms (like pain or tenderness). Documenting these changes can provide valuable information for your healthcare provider.

- Consider Hormonal Factors: Since you’ve noted a correlation with your menstrual cycle, discussing these hormonal factors with your doctor may lead to a better understanding of your symptoms. They may suggest hormonal evaluations or treatments if they suspect hormonal fluctuations are contributing to your symptoms.

- Stay Informed and Calm: While it’s natural to feel anxious about health concerns, try to focus on obtaining accurate information and working closely with your healthcare team. They are best equipped to guide you through this process and alleviate your concerns.

In conclusion, while the presence of a lump in the axilla can be concerning, many benign conditions can cause such symptoms. It’s essential to maintain open communication with your healthcare provider and pursue further evaluation to ensure your peace of mind and health. Don’t hesitate to seek a second opinion if you feel your concerns are not being adequately addressed. Take care, and I wish you the best in your health journey!