Conversation: The conversation between human and AI assistant.
[|Human|] I have had pain, some severe, and numbness in my left anterior thigh along with swelling of my entire left leg I have had a CT scan of the lumbar spine and an MRI of my lumbar spine which were both negative. The pain is worse at night when I am sleeping and it wakes me it is so severe. Also if I walk too much or sit too long I have pain. I have seen 3 doctors and they all seem to be stumped. I am having an MRI of my abdomen on Friday to see if there is a mass in my abdomen pinching on a nerve. I have been having this problem since the middle of December.
[|AI|]  Hi, As you have mentioned, one of the causes would be a radiculopathy. However, I think since the MRI is negative, another possible because that needs to be ruled out is a neuropathy- an isolated single nerve involvement, called mononeuropathy. I agree with the testing of the MRI abdomen. However, I think you should also be tested with a Nerve Conduction study of all 4 limbs-sensory as well as motor. This may need to be followed by a nerve biopsy. Hope I have answered your query. Let me know if I can assist you further.