Lumps on the Inner Thigh: Causes and Treatment Options

What type of tumor is it?

Hello, doctor.
I have recently noticed some lumps on the inner side of my thighs.
They seem to be located a bit deeper under the skin, as they are not visible on the surface and can only be felt with firm pressure.
Each lump is approximately 0.5 to 1 centimeter in size, and there are about six of them on both thighs from the root to the knee.
When not touched, they cause a very mild discomfort, but they are more painful when pressed, similar to the pain of pressing a pimple.
However, I am certain they are not pimples, as they are not visible on the skin and do not move; the borders are also very distinct.
I am eager to know what these could be.
Could this be related to the liposuction I had five years ago, or the fat grafting I underwent six months ago? If so, why would they appear after such a long time? It seems unlikely that this is the cause since so much time has passed without issues.
If it is unrelated, what could be the reason? If a check-up or removal is necessary, what methods would be used for examination? If removal is needed, can it be done under general anesthesia? I am uncertain about the exact location and quantity of these lumps.
I appreciate your guidance.
Thank you.

Lin, 20~29 year old female. Ask Date: 2020/12/09

Dr. Li Zhonghuai reply Surgery

Hello! It is most likely fat necrosis, and surgical removal is sufficient.
If there are many lesions, at most a regional anesthesia will be needed, and general anesthesia is not required.
Wishing you well! Changhua Hospital cares about you!

Reply Date: 2020/12/09

More Info

Lumps on the inner thigh can be concerning, especially when they are not visible on the surface and only felt upon pressure. Based on your description, these lumps are likely subcutaneous nodules, which can arise from various causes. Here are some potential explanations and treatment options.

Possible Causes
1. Lipomas: These are benign tumors made of fatty tissue. They are usually soft, movable, and painless, but in some cases, they can be firm and tender, especially if they are located deeper in the tissue.

2. Sebaceous Cysts: These are small lumps that can form under the skin due to blocked sebaceous glands. They can become inflamed or infected, leading to tenderness and discomfort.

3. Lymphadenopathy: Swollen lymph nodes can occur due to infections or other medical conditions. If the lumps are near the groin area, they could be lymph nodes reacting to an infection or inflammation in the lower extremities.

4. Scar Tissue: Given your history of liposuction and fat grafting, it is possible that these lumps are related to scar tissue formation. Sometimes, after surgical procedures, the body can form fibrous tissue that may feel like lumps.

5. Fibromas or Other Benign Tumors: These are also possibilities, though less common. They can develop in the soft tissue and may cause discomfort.

Diagnosis
To determine the exact nature of these lumps, a thorough evaluation is necessary. Here are some steps that may be taken:
- Physical Examination: A healthcare provider will examine the lumps to assess their size, shape, consistency, and tenderness.

- Imaging Studies: An ultrasound or MRI may be recommended to visualize the lumps better and determine their characteristics and depth.

- Biopsy: If there is any suspicion of malignancy or if the lumps do not resolve, a biopsy may be performed. This involves taking a small sample of tissue for laboratory analysis.

Treatment Options
1. Observation: If the lumps are benign and not causing significant discomfort, your doctor may recommend monitoring them over time.

2. Surgical Removal: If the lumps are bothersome, painful, or if there is uncertainty about their nature, surgical excision may be performed. This can often be done under local anesthesia, but if the area is extensive or if you prefer, general anesthesia can be used.

3. Medication: If the lumps are due to an infection or inflammation, appropriate medications such as antibiotics or anti-inflammatory drugs may be prescribed.

4. Follow-Up: Regular follow-up appointments may be necessary to monitor the lumps and ensure they do not change in size or character.

Conclusion
Given your history of thigh procedures, it is essential to consult with a healthcare provider who can perform a thorough evaluation. While the lumps may be benign, it is crucial to rule out any serious conditions. If you are concerned about the lumps, do not hesitate to seek medical advice. Early diagnosis and management can help alleviate any potential complications and provide peace of mind.

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