Unexplained Indentation on Right Thigh: Numbness and Concerns Explained - Orthopedics

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A horizontal indentation unexpectedly appeared on the right thigh muscle, followed by a sensation of numbness two weeks later?


Hello Doctor: About two weeks ago, a horizontal indentation approximately ten centimeters long and two to three centimeters wide appeared on the mid-anterior part of my right thigh.
It has not gone away, and in the past few days, the area has started to feel a bit numb.
I would like to ask for your advice on diagnosis and treatment.
I recently visited the orthopedic department at National Taiwan University Hospital, where the doctor initially diagnosed it as possibly being caused by a bone fracture (although I have not experienced any impact or trauma recently) or the formation of a tumor.
He recommended an MRI, which has made me quite anxious and concerned.
I hope you can provide me with a second opinion.
Thank you.

Xiao Sha, 20~29 year old female. Ask Date: 2004/10/07

Dr. Li Wenlin reply Orthopedics


Hello: In response to your question, arranging for an MRI is the right decision.
Please do not worry; it is a highly diagnostic examination for bones and soft tissues.
I believe it will lead to an early diagnosis and prompt treatment.

Reply Date: 2004/10/07

More Info


It sounds like you are experiencing a concerning symptom with the unexplained indentation on your right thigh, accompanied by numbness. Given the details you've provided, it is understandable that you are feeling anxious about this situation. Let’s break down the potential causes and the steps you should consider taking.

Firstly, the indentation you describe could be due to several factors. While the orthopedic specialist suggested possibilities such as a fracture or a tumor, it’s important to consider other benign causes as well. For instance, muscle atrophy or changes in the subcutaneous tissue can sometimes create indentations without any underlying serious pathology. Conditions such as lipodystrophy, where there is a loss of fat tissue, can also lead to similar appearances.
The numbness you are experiencing could be related to nerve compression or irritation. This might occur due to various reasons, including postural issues, repetitive strain, or even a herniated disc in the lower back that affects the nerves supplying the thigh. It’s crucial to note that the presence of numbness, especially if it is new or worsening, warrants further investigation.

Given that you have already consulted with an orthopedic surgeon, the recommendation for an MRI is a prudent step. MRI is a non-invasive imaging technique that provides detailed images of soft tissues, including muscles, nerves, and any potential tumors or lesions. It can help rule out serious conditions such as tumors or significant nerve compression. While waiting for the MRI, it may be helpful to keep a record of any additional symptoms you experience, such as changes in sensation, weakness, or pain, as this information can be valuable for your healthcare provider.

In the meantime, consider the following recommendations:
1. Avoid Strain: Try to avoid activities that may exacerbate the numbness or indentation. This includes heavy lifting or prolonged sitting in one position.

2. Physical Therapy: If you have access to a physical therapist, they can provide exercises to strengthen the muscles around the thigh and improve overall function. They can also assess your posture and movement patterns to identify any contributing factors.

3. Monitor Symptoms: Keep track of any changes in the indentation or numbness. If you notice any new symptoms, such as increased pain, swelling, or changes in mobility, contact your healthcare provider promptly.

4. Seek a Second Opinion: If you remain anxious about the diagnosis or the recommended MRI, seeking a second opinion from another orthopedic specialist or a neurologist could provide additional reassurance and insight.

5. Stay Informed: Educate yourself about potential conditions that could cause your symptoms. Understanding what might be happening can help alleviate some anxiety, but be cautious about self-diagnosing based on internet research.

In conclusion, while the indentation and numbness in your thigh are concerning, there are various potential explanations, many of which are not serious. The MRI will be a crucial step in determining the underlying cause. Until then, take care of yourself, avoid aggravating activities, and consider consulting with a physical therapist for supportive care. It’s essential to maintain open communication with your healthcare providers and express any concerns you may have regarding your symptoms and the diagnostic process.

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